Updated March 30, 2024: We have determined that Fedora Linux 40 beta does contain two affected versions of xz libraries - xz-libs-5.6.0-1.fc40.x86_64.rpm and xz-libs-5.6.0-2.fc40.x86_64.rpm. At this time, Fedora 40 Linux does not appear to be affected by the actual malware exploit, but we encourage all Fedora 40 Linux beta users to revert to 5.4.x versions.Editor's note: This post has been updated to more clearly articulate the affected versions of Fedora Linux and add additional mitigation methods.Yesterday, Red Hat Information Risk and Security and Red Hat Product Security learned that the l

_Updated March 30, 2024: We have determined that Fedora Linux 40 beta does contain two affected versions of xz libraries - xz-libs-5.6.0-1.fc40.x86\_64.rpm and xz-libs-5.6.0-2.fc40.x86\_64.rpm. At this time, Fedora 40 Linux does not appear to be affected by the actual malware exploit, but we encourage all Fedora 40 Linux beta users to revert to 5.4.x versions._

_Editor's note: This post has been updated to more clearly articulate the affected versions of Fedora Linux and add additional mitigation methods._

Yesterday, Red Hat Information Risk and Security and Red Hat Product Security learned that the latest versions of the “xz” tools and libraries **contain** **malicious code** **that appears to be intended to allow unauthorized access. Specifically, this code is present in versions 5.6.0 and 5.6.1 of the libraries**. Fedora Linux 40 users may have received version 5.6.0, depending on the timing of system updates. Fedora Rawhide users may have received version 5.6.0 or 5.6.1. This vulnerability was assigned CVE-2024-3094.

**PLEASE IMMEDIATELY STOP USAGE OF ANY FEDORA RAWHIDE INSTANCES** for work or personal activity. Fedora Rawhide will be reverted to xz-5.4.x shortly, and once that is done, Fedora Rawhide instances can safely be redeployed. _Note that Fedora Rawhide is the development distribution of Fedora Linux, and serves as the basis for future Fedora Linux builds (in this case, the yet-to-be-released Fedora Linux 41)._

**At this time the Fedora Linux 40 builds have not been shown to be compromised.** We believe the malicious code injection did not take effect in these builds. However, Fedora Linux 40 users should still downgrade to a 5.4 build to be safe. An update that reverts xz to 5.4.x has recently been published and is becoming available to Fedora Linux 40 users through the normal update system. Concerned users can force the update by following the instructions at https://bodhi.fedoraproject.org/updates/FEDORA-2024-d02c7bb266.

_Updated March 30, 2024: We have determined that Fedora Linux 40 beta does contain two affected versions of xz libraries - xz-libs-5.6.0-1.fc40.x86\_64.rpm and xz-libs-5.6.0-2.fc40.x86\_64.rpm. At this time, Fedora 40 Linux does not appear to be affected by the actual malware exploit, but we encourage all Fedora 40 Linux beta users to revert to 5.4.x versions._

**What is xz?**

xz is a general purpose data compression format present in nearly every Linux distribution, both community projects and commercial product distributions. Essentially, it helps compress (and then decompress) large file formats into smaller, more manageable sizes for sharing via file transfers.

**What is the malicious code?**

The malicious injection present in the xz versions 5.6.0 and 5.6.1 libraries is obfuscated and only included in full in the download package - the Git distribution lacks the M4 macro that triggers the build of the malicious code. The second-stage artifacts are present in the Git repository for the injection during the build time, in case the malicious M4 macro is present.

The resulting malicious build interferes with authentication in sshd via systemd.  SSH is a commonly used protocol for connecting remotely to systems, and sshd is the service that allows access.  **Under the right circumstances this interference could potentially enable a malicious actor to break sshd authentication and gain unauthorized access to the entire system remotely.**

**What distributions are affected by this malicious code?**

Current investigation indicates that the packages are only present in Fedora 40 and Fedora Rawhide within the Red Hat community ecosystem.

_**No versions of Red Hat Enterprise Linux (RHEL) are affected.**_

We have reports and evidence of the injections successfully building in xz 5.6.x versions built for Debian unstable (Sid). Other distributions may also be affected. Users of other distributions should consult with their distributors for guidance.

**What should I do if I am running an affected distribution?**

For both personal and business activities, immediately stop using Fedora 40 or Fedora Rawhide until you can downgrade your xz version. If you are using an affected distribution in a business setting, we encourage you to contact your information security team for next steps.

Additionally, for those running openSUSE distributions, SUSE has published a downgrade procedure at https://build.opensuse.org/request/show/1163302.

Urgent security alert for Fedora Linux 40 and Fedora Rawhide users

Red Hat Security Advisory 2024-1557-03 - An update is now available for Red Hat OpenShift Builds 1.0. Issues addressed include denial of service and traversal vulnerabilities.

    The following advisory data is extracted from:https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1557.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Critical: Errata Advisory for Red Hat OpenShift Builds 1.0.1Advisory ID:        RHSA-2024:1557-03Product:            Builds for Red Hat OpenShiftAdvisory URL:       https://access.redhat.com/errata/RHSA-2024:1557Issue date:         2024-03-28Revision:           03CVE Names:          CVE-2023-48795====================================================================Summary: An update is now available for Red Hat OpenShift Builds 1.0.Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:Red Hat OpenShift Builds 1.0.Security Fix(es):* CVE-2023-48795 ssh: Prefix truncation attack on Binary Packet Protocol (BPP)* CVE-2023-49569 go-git: Maliciously crafted Git server replies can lead to path traversal and RCE on go-git clients* CVE-2023-49568 go-git: Maliciously crafted Git server replies can cause DoS on go-git clientsFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-48795References:https://access.redhat.com/security/updates/classification/#criticalhttps://bugzilla.redhat.com/show_bug.cgi?id=2254210https://bugzilla.redhat.com/show_bug.cgi?id=2258143https://bugzilla.redhat.com/show_bug.cgi?id=2258165

Red Hat Security Advisory 2024-1557-03

Red Hat Security Advisory 2024-1555-03 - An update for.NET 6.0 is now available for Red Hat Enterprise Linux 9. Issues addressed include a denial of service vulnerability.

    The following advisory data is extracted from:https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1555.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Important: .NET 6.0 security updateAdvisory ID:        RHSA-2024:1555-03Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2024:1555Issue date:         2024-03-28Revision:           03CVE Names:          CVE-2024-21404====================================================================Summary: An update for .NET 6.0 is now available for Red Hat Enterprise Linux 9.Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.127 and .NET Runtime 6.0.27.Security Fix(es):* dotnet: Denial of Service in X509Certificate2 (CVE-2024-21404)For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2024-21404References:https://access.redhat.com/security/updates/classification/#importanthttps://bugzilla.redhat.com/show_bug.cgi?id=2263086

Red Hat Security Advisory 2024-1555-03

Red Hat Security Advisory 2024-1554-03 - An update for.NET 6.0 is now available for Red Hat Enterprise Linux 8. Issues addressed include a denial of service vulnerability.

    The following advisory data is extracted from:https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1554.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Important: .NET 6.0 security updateAdvisory ID:        RHSA-2024:1554-03Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2024:1554Issue date:         2024-03-28Revision:           03CVE Names:          CVE-2024-21404====================================================================Summary: An update for .NET 6.0 is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.127 and .NET Runtime 6.0.27.Security Fix(es):* dotnet: Denial of Service in X509Certificate2 (CVE-2024-21404)For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2024-21404References:https://access.redhat.com/security/updates/classification/#importanthttps://bugzilla.redhat.com/show_bug.cgi?id=2263086

Red Hat Security Advisory 2024-1554-03

Red Hat Security Advisory 2024-1553-03 - An update for.NET 6.0 is now available for Red Hat Enterprise Linux 8. Issues addressed include a denial of service vulnerability.

    The following advisory data is extracted from:https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1553.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Important: .NET 6.0 security updateAdvisory ID:        RHSA-2024:1553-03Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2024:1553Issue date:         2024-03-28Revision:           03CVE Names:          CVE-2024-21404====================================================================Summary: An update for .NET 6.0 is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.127 and .NET Runtime 6.0.27.Security Fix(es):* dotnet: Denial of Service in X509Certificate2 (CVE-2024-21404)For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2024-21404References:https://access.redhat.com/security/updates/classification/#importanthttps://bugzilla.redhat.com/show_bug.cgi?id=2263086

Red Hat Security Advisory 2024-1553-03

Red Hat Security Advisory 2024-1552-03 - An update for.NET 6.0 is now available for Red Hat Enterprise Linux 9. Issues addressed include a denial of service vulnerability.

    The following advisory data is extracted from:https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1552.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Important: .NET 6.0 security updateAdvisory ID:        RHSA-2024:1552-03Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2024:1552Issue date:         2024-03-28Revision:           03CVE Names:          CVE-2024-21404====================================================================Summary: An update for .NET 6.0 is now available for Red Hat Enterprise Linux 9.Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.127 and .NET Runtime 6.0.27.Security Fix(es):* dotnet: Denial of Service in X509Certificate2 (CVE-2024-21404)For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2024-21404References:https://access.redhat.com/security/updates/classification/#importanthttps://bugzilla.redhat.com/show_bug.cgi?id=2263086

Red Hat Security Advisory 2024-1552-03

Red Hat Security Advisory 2024-1549-03 - Updated images are now available for Red Hat Advanced Cluster Security. The updated image includes bug and security fixes. Issues addressed include a traversal vulnerability.

The following advisory data is extracted from:

https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1549.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff

====================================================================  
Red Hat Security Advisory

Synopsis:           Critical: ACS 4.3 enhancement and security update  
Advisory ID:        RHSA-2024:1549-03  
Product:            Red Hat Advanced Cluster Security for Kubernetes  
Advisory URL:       https://access.redhat.com/errata/RHSA-2024:1549  
Issue date:         2024-03-28  
Revision:           03  
CVE Names:          CVE-2019-25210  
====================================================================

Summary: 

Updated images are now available for Red Hat Advanced Cluster Security. The  
updated image includes bug and security fixes.

Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description:

This release of RHACS 4.3.6 provides the following bug fix:

* Fixed an issue where an incorrectly configured Jira notifier causes the Central component of RHACS to enter a crash loop

It provides the following security fixes:

* go-git: Maliciously crafted Git server replies can lead to path traversal and RCE on go-git clients (CVE-2023-49569)  
* helm: Missing YAML content leads to panic (CVE-2024-26147)  
* helm: Shows secrets with --dry-run option in clear text (CVE-2019-25210)

For more details about the security issue(s), including the impact, a CVSS  
score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution:

CVEs:

CVE-2019-25210

References:

https://access.redhat.com/security/updates/classification/#critical  
https://bugzilla.redhat.com/show_bug.cgi?id=2258143  
https://bugzilla.redhat.com/show_bug.cgi?id=2265440  
https://issues.redhat.com/browse/ROX-23314

Red Hat Security Advisory 2024-1549-03

Red Hat Security Advisory 2024-1545-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 8.6 Extended Update Support. Issues addressed include a use-after-free vulnerability.

The following advisory data is extracted from:

https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1545.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff

====================================================================  
Red Hat Security Advisory

Synopsis:           Important: dnsmasq security update  
Advisory ID:        RHSA-2024:1545-03  
Product:            Red Hat Enterprise Linux  
Advisory URL:       https://access.redhat.com/errata/RHSA-2024:1545  
Issue date:         2024-03-27  
Revision:           03  
CVE Names:          CVE-2022-0934  
====================================================================

Summary: 

An update for dnsmasq is now available for Red Hat Enterprise Linux 8.6 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description:

The dnsmasq packages contain dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.

Security Fixes:

* dnsmasq: Heap use after free in dhcp6_no_relay (CVE-2022-0934)

* dnsmasq: default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 (CVE-2023-28450)

* dnsmasq: bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator (CVE-2023-50387)

* dnsmasq: bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources (CVE-2023-50868)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution:

https://access.redhat.com/articles/11258

CVEs:

CVE-2022-0934

References:

https://access.redhat.com/security/updates/classification/#important  
https://bugzilla.redhat.com/show_bug.cgi?id=2057075  
https://bugzilla.redhat.com/show_bug.cgi?id=2178948  
https://bugzilla.redhat.com/show_bug.cgi?id=2263914  
https://bugzilla.redhat.com/show_bug.cgi?id=2263917

Red Hat Security Advisory 2024-1545-03

Red Hat Security Advisory 2024-1544-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.

The following advisory data is extracted from:

https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1544.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff

====================================================================  
Red Hat Security Advisory

Synopsis:           Important: dnsmasq security and bug fix update  
Advisory ID:        RHSA-2024:1544-03  
Product:            Red Hat Enterprise Linux  
Advisory URL:       https://access.redhat.com/errata/RHSA-2024:1544  
Issue date:         2024-03-27  
Revision:           03  
CVE Names:          CVE-2023-28450  
====================================================================

Summary: 

An update for dnsmasq is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description:

The dnsmasq packages contain dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.

Security Fixes:

* dnsmasq: default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 (CVE-2023-28450)

* dnsmasq: bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator (CVE-2023-50387)

* dnsmasq: bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources (CVE-2023-50868)

Bug Fix:

* Segmentation fault occurs in dnsmasq-2.79-26 in RHEL8

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution:

https://access.redhat.com/articles/11258

CVEs:

CVE-2023-28450

References:

https://access.redhat.com/security/updates/classification/#important  
https://bugzilla.redhat.com/show_bug.cgi?id=2178948  
https://bugzilla.redhat.com/show_bug.cgi?id=2263914  
https://bugzilla.redhat.com/show_bug.cgi?id=2263917

Red Hat Security Advisory 2024-1544-03

Red Hat Security Advisory 2024-1543-03 - An update for dnsmasq is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.

    The following advisory data is extracted from:https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1543.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Important: dnsmasq security updateAdvisory ID:        RHSA-2024:1543-03Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2024:1543Issue date:         2024-03-27Revision:           03CVE Names:          CVE-2023-50387====================================================================Summary: An update for dnsmasq is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:The dnsmasq packages contain dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.Security Fix(es):* dnsmasq: bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator (CVE-2023-50387)* dnsmasq: bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources (CVE-2023-50868)For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-50387References:https://access.redhat.com/security/updates/classification/#importanthttps://bugzilla.redhat.com/show_bug.cgi?id=2263914https://bugzilla.redhat.com/show_bug.cgi?id=2263917

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#red_hat