#dos

Maliciously-crafted software artifacts can cause denial of service of the machine running Cosign, thereby impacting all services on the machine. The root cause is that Cosign creates slices based on the number of signatures, manifests or attestations in untrusted artifacts. As such, the untrusted artifact can control the amount of memory that Cosign allocates. As an example, these lines demonstrate the problem: https://github.com/sigstore/cosign/blob/286a98a4a99c1b2f32f84b0d560e324100312280/pkg/oci/remote/signatures.go#L56-L70 This `Get()` method gets the manifest of the image, allocates a slice equal to the length of the layers in the manifest, loops through the layers and adds a new signature to the slice. The exact issue is Cosign allocates excessive memory on the lines that creates a slice of the same length as the manifests. ## Remediation Update to the latest version of Cosign, where the number of attestations, signatures and manifests has been limited to a reasonable v...

### Summary A remote image with a malicious attachment can cause denial of service of the host machine running Cosign. This can impact other services on the machine that rely on having memory available such as a Redis database which can result in data loss. It can also impact the availability of other services on the machine that will not be available for the duration of the machine denial. ### Details The root cause of this issue is that Cosign reads the attachment from a remote image entirely into memory without checking the size of the attachment first. As such, a large attachment can make Cosign read a large attachment into memory; If the attachments size is larger than the machine has memory available, the machine will be denied of service. The Go runtime will make a `SIGKILL` after a few seconds of system-wide denial. The root cause is that Cosign reads the contents of the attachments entirely into memory on line 238 below: https://github.com/sigstore/cosign/blob/9bc3ee309bf35...

Ubuntu Security Notice 6728-2 - USN-6728-1 fixed vulnerabilities in Squid. The fix for CVE-2023-5824 caused Squid to crash in certain environments on Ubuntu 20.04 LTS. The problematic fix has been reverted pending further investigation. Joshua Rogers discovered that Squid incorrectly handled collapsed forwarding. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. Joshua Rogers discovered that Squid incorrectly handled certain structural elements. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. Joshua Rogers discovered that Squid incorrectly handled Cache Manager error responses. A remote trusted client can possibly use this issue to cause Squid to crash, resulting in a denial of service. Joshua Rogers discovered that Squid incorrectly handled the HTTP Chunked decoder. A remote attacker could possibly use this ...

Ubuntu Security Notice 6728-1 - Joshua Rogers discovered that Squid incorrectly handled collapsed forwarding. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. Joshua Rogers discovered that Squid incorrectly handled certain structural elements. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service.

Red Hat Security Advisory 2024-1752-03 - An update is now available for Red Hat OpenShift GitOps v1.12.1 for Argo CD CLI and MicroShift GitOps. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link in the References section. Issues addressed include bypass and denial of service vulnerabilities.

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).  View CSAF 1. EXECUTIVE SUMMARY CVSS v4 7.2 ATTENTION: Exploitable remotely/low attack complexity Vendor: Siemens Equipment: SINEC NMS Vulnerabilities: Improper Check for Unusual or Exceptional Conditions, Improper Limitation of a Pathname to a Restricted Directory 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to impact confidentiality, integrity, and availability. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following products of Siemens, are affected: SINEC NMS: All versions prior to V2.0 SP2 3.2 Vulnerability Overview 3.2.1 IMPROPER CHECK FOR UNUSUAL OR EXCEPTIONAL CONDITIONS CWE-754 Generating excessively long X9.42 DH keys o...

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).  View CSAF 1. EXECUTIVE SUMMARY CVSS v3 8.8 ATTENTION: Exploitable remotely/low attack complexity Vendor: Siemens Equipment: Telecontrol Server Basic Vulnerabilities: Inadequate Encryption Strength, Double Free, Integer Overflow or Wraparound, External Control of File Name or Path, Path Traversal, Improper Input Validation, Missing Encryption of Sensitive Data, Use After Free, Improper Certificate Validation, Inefficient Regular Expression Complexity, Improper Check for Unusual or Exceptional Conditions, NULL Pointer Dereference, Improper Restriction of Operations within the Bounds of a Memory Buffer 2. RISK EVALUATION Successful exploitation of this vulnerability could 3. TEC...

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).  View CSAF 1. EXECUTIVE SUMMARY CVSS v4 7.3 ATTENTION: Low Attack Complexity Vendor: Siemens Equipment: Parasolid Vulnerabilities: Out-of-bounds Read, Allocation of Resources Without Limits or Throttling, NULL Pointer Dereference 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to execute code within the context of the current process. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following products of Siemens, are affected: Siemens Parasolid V35.1: Versions prior to V35.1.254 Siemens Parasolid V36.0: Versions prior to V36.0.207 Siemens Parasolid V36.1: Versions prior to V36.1.147 3.2 Vulnerability Overview 3.2.1 OUT-OF-BOUNDS READ C...

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).  View CSAF 1. EXECUTIVE SUMMARY CVSS v3 7.8 ATTENTION: Exploitable remotely/low attack complexity Vendor: Siemens Equipment: SIMATIC S7-1500 Vulnerabilities: Improper Check for Unusual or Exceptional Conditions, Improper Input Validation, Use After Free, Out-of-bounds Write 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attack to cause a heap-based buffer overflow, local privilege escalation, kernel information leak, and a denial-of-service condition. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following Siemens products are affected: Siemens SIMATIC S7-1500 TM MFP (GNU/Linux subsystem): All versions 3.2 Vulnerability Overview 3.2.1 IMPRO...

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).  View CSAF 1. EXECUTIVE SUMMARY CVSS v4 8.2 ATTENTION: Exploitable remotely/low attack complexity Vendor: Siemens Equipment: RUGGEDCOM APE1808 Vulnerabilities: Cross-site Scripting, Improper Privilege Management, Improper Check for Unusual or Exceptional Conditions, Truncation of Security-relevant Information, Insufficient Session Expiration 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow a malicious administrator to store a JavaScript payload using the web interface, revoke active XML API keys from the firewall and disrupt XML API usage, or cause a denial-of-service. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of Siemens R...