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CVE-2021-3493: security - [CVE-2021-3493] Ubuntu Linux kernel overlayfs fs caps privilege escalation

The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on files in an underlying file system. Due to the combination of unprivileged user namespaces along with a patch carried in the Ubuntu kernel to allow unprivileged overlay mounts, an attacker could use this to gain elevated privileges.

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CVE-2021-3493: security - [CVE-2021-3493] Ubuntu Linux kernel overlayfs fs caps privilege escalation

The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on files in an underlying file system. Due to the combination of unprivileged user namespaces along with a patch carried in the Ubuntu kernel to allow unprivileged overlay mounts, an attacker could use this to gain elevated privileges.

CVE-2021-27815: NullPointer in actions.c:701:7 · Issue #4 · libexif/exif

NULL Pointer Deference in the exif command line tool, when printing out XML formatted EXIF data, in exif v0.6.22 and earlier allows attackers to cause a Denial of Service (DoS) by uploading a malicious JPEG file, causing the application to crash.

CVE-2021-21393: Type hints and validation improvements by clokep · Pull Request #9321 · matrix-org/synapse

Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. Note that the groups feature is not part of the Matrix specification and the chosen maximum lengths are arbitrary. Not all clients might abide by them. Refer to referenced GitHub security advisory for additional details including workarounds.

CVE-2020-28872: Offensive Security’s Exploit Database Archive

An authorization bypass vulnerability in Monitorr v1.7.6m in Monitorr/assets/config/_installation/_register.php allows an unauthorized person to create valid credentials.

CVE-2021-22203: Kroki Arbitrary File Read/Write (#320919) · Issues · GitLab.org / GitLab · GitLab

An issue has been discovered in GitLab CE/EE affecting all versions starting from 13.7.9 before 13.8.7, all versions starting from 13.9 before 13.9.5, and all versions starting from 13.10 before 13.10.1. A specially crafted Wiki page allowed attackers to read arbitrary files on the server.

CVE-2021-21421: Fix #17 do not report secret on error, add github action · creharmony/node-etsy-client@b4beb8e

node-etsy-client is a NodeJs Etsy ReST API Client. Applications that are using node-etsy-client and reporting client error to the end user will offer api key value too This is fixed in node-etsy-client v0.3.0 and later.

CVE-2021-21333: Clean-up the template loading code by clokep · Pull Request #9200 · matrix-org/synapse

Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.27.0, the notification emails sent for notifications for missed messages or for an expiring account are subject to HTML injection. In the case of the notification for missed messages, this could allow an attacker to insert forged content into the email. The account expiry feature is not enabled by default and the HTML injection is not controllable by an attacker. This is fixed in version 1.27.0.

CVE-2021-21333: Clean-up the template loading code by clokep · Pull Request #9200 · matrix-org/synapse

Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.27.0, the notification emails sent for notifications for missed messages or for an expiring account are subject to HTML injection. In the case of the notification for missed messages, this could allow an attacker to insert forged content into the email. The account expiry feature is not enabled by default and the HTML injection is not controllable by an attacker. This is fixed in version 1.27.0.

CVE-2021-20285: canPack@p_lx_elf.cpp:2571 BufferOverflow (both latest release version and devel version) · Issue #421 · upx/upx

A flaw was found in upx canPack in p_lx_elf.cpp in UPX 3.96. This flaw allows attackers to cause a denial of service (SEGV or buffer overflow and application crash) or possibly have unspecified other impacts via a crafted ELF. The highest threat from this vulnerability is to system availability.