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Ubuntu Security Notice USN-6407-1
Ubuntu Security Notice 6407-1 - Gregory James Duck discovered that libx11 incorrectly handled certain keyboard symbols. If a user were tricked into connecting to a malicious X server, a remote attacker could use this issue to cause libx11 to crash, resulting in a denial of service, or possibly execute arbitrary code. Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could possibly use this issue to consume memory, leading to a denial of service.
==========================================================================Ubuntu Security Notice USN-6407-1October 03, 2023libx11 vulnerabilities==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 23.04- Ubuntu 22.04 LTS- Ubuntu 20.04 LTSSummary:Several security issues were fixed in libx11.Software Description:- libx11: X11 client-side libraryDetails:Gregory James Duck discovered that libx11 incorrectly handled certainkeyboard symbols. If a user were tricked into connecting to a malicious Xserver, a remote attacker could use this issue to cause libx11 to crash,resulting in a denial of service, or possibly execute arbitrary code.(CVE-2023-43785)Yair Mizrahi discovered that libx11 incorrectly handled certain malformedXPM image files. If a user were tricked into opening a specially craftedXPM image file, a remote attacker could possibly use this issue to consumememory, leading to a denial of service. (CVE-2023-43786)Yair Mizrahi discovered that libx11 incorrectly handled certain malformedXPM image files. If a user were tricked into opening a specially craftedXPM image file, a remote attacker could use this issue to cause libx11 tocrash, leading to a denial of service, or possibly execute arbitrary code.(CVE-2023-43787)Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 23.04: libx11-6 2:1.8.4-2ubuntu0.3Ubuntu 22.04 LTS: libx11-6 2:1.7.5-1ubuntu0.3Ubuntu 20.04 LTS: libx11-6 2:1.6.9-2ubuntu1.6After a standard system update you need to reboot your computer to make allthe necessary changes.References: https://ubuntu.com/security/notices/USN-6407-1 CVE-2023-43785, CVE-2023-43786, CVE-2023-43787Package Information: https://launchpad.net/ubuntu/+source/libx11/2:1.8.4-2ubuntu0.3 https://launchpad.net/ubuntu/+source/libx11/2:1.7.5-1ubuntu0.3 https://launchpad.net/ubuntu/+source/libx11/2:1.6.9-2ubuntu1.6Related news
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