K98121587 : glibc vulnerability CVE-2021-35942

Security Advisory Description

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. (CVE-2021-35942)

Impact

A local attacker can pass untrusted specially-crafted regular expressions to the wordexp function to cause an integer overflow, potentially leading to a denial of service (DoS) or restricted information disclosure.