K49921213 : glibc vulnerability CVE-2020-1752

Security Advisory Description

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32. (CVE-2020-1752)

Impact

To exploit this issue, a user with the ability to create directories may be tricked into first creating a very large directory path, then accessing that path with a glob call. This behavior may lead to arbitrary code execution.