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CVE-2021-35942

Status Candidate

Overview

The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash or read arbitrary memory in parse_param (in posix/wordexp.c) when called with an untrusted, crafted pattern, potentially resulting in a denial of service or disclosure of information. This occurs because atoi was used but strtoul should have been used to ensure correct calculations.

Related Files

Ubuntu Security Notice USN-5310-1
Posted Mar 2, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5310-1 - Jan Engelhardt, Tavis Ormandy, and others discovered that the GNU C Library iconv feature incorrectly handled certain input sequences. An attacker could possibly use this issue to cause the GNU C Library to hang or crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Jason Royes and Samuel Dytrych discovered that the GNU C Library incorrectly handled signed comparisons on ARMv7 targets. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2016-10228, CVE-2020-29562, CVE-2020-6096, CVE-2021-27645, CVE-2021-3326, CVE-2021-35942, CVE-2021-3998, CVE-2021-3999, CVE-2022-23219
SHA-256 | 0c11352a9e9620a9d78b56edf5a195481c3c772b41e829e66010783e0ca89f70
Red Hat Security Advisory 2021-4358-03
Posted Nov 10, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4358-03 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the name service cache daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Issues addressed include a use-after-free vulnerability.

tags | advisory
systems | linux, redhat, osx
advisories | CVE-2021-27645, CVE-2021-33574, CVE-2021-35942
SHA-256 | 16dc38d5ed172ddc59367e5e6576ecbccd33c10e1ecf8067de90c8efc671ea91
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