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Ubuntu Security Notice USN-6762-1

Ubuntu Security Notice 6762-1 - It was discovered that GNU C Library incorrectly handled netgroup requests. An attacker could possibly use this issue to cause a crash or execute arbitrary code. This issue only affected Ubuntu 14.04 LTS. It was discovered that GNU C Library might allow context-dependent attackers to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. It was discovered that GNU C Library when processing very long pathname arguments to the realpath function, could encounter an integer overflow on 32-bit architectures, leading to a stack-based buffer overflow and, potentially, arbitrary code execution. This issue only affected Ubuntu 14.04 LTS.

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#vulnerability#ubuntu#dos#buffer_overflow
==========================================================================Ubuntu Security Notice USN-6762-1May 02, 2024eglibc, glibc vulnerabilities==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 18.04 LTS- Ubuntu 16.04 LTS- Ubuntu 14.04 LTSSummary:Several security issues were fixed in GNU C Library.Software Description:- glibc: GNU C Library- eglibc: GNU C LibraryDetails:It was discovered that GNU C Library incorrectly handled netgroup requests.An attacker could possibly use this issue to cause a crash or execute arbitrary code.This issue only affected Ubuntu 14.04 LTS. (CVE-2014-9984)It was discovered that GNU C Library might allow context-dependentattackers to cause a denial of service. This issue only affected Ubuntu 14.04 LTS.(CVE-2015-20109)It was discovered that GNU C Library when processing very long pathname arguments tothe realpath function, could encounter an integer overflow on 32-bitarchitectures, leading to a stack-based buffer overflow and, potentially,arbitrary code execution. This issue only affected Ubuntu 14.04 LTS.(CVE-2018-11236)It was discovered that the GNU C library getcwd function incorrectlyhandled buffers. An attacker could use this issue to cause the GNU CLibrary to crash, resulting in a denial of service, or possibly executearbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2021-3999)Charles Fol discovered that the GNU C Library iconv feature incorrectlyhandled certain input sequences. An attacker could use this issue to causethe GNU C Library to crash, resulting in a denial of service, or possiblyexecute arbitrary code. (CVE-2024-2961)Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 18.04 LTS  libc6                           2.27-3ubuntu1.6+esm2                                  Available with Ubuntu ProUbuntu 16.04 LTS  libc6                           2.23-0ubuntu11.3+esm6                                  Available with Ubuntu ProUbuntu 14.04 LTS  libc6                           2.19-0ubuntu6.15+esm3                                  Available with Ubuntu ProAfter a standard system update you need to reboot your computer to makeall the necessary changes.References:  https://ubuntu.com/security/notices/USN-6762-1  CVE-2014-9984, CVE-2015-20109, CVE-2018-11236, CVE-2021-3999,  CVE-2024-2961, https://launchpad.net/bugs/2063328

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