Out-of-bounds Write Affecting glibc-info package, versions <2.26-13.56.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.22% (60th percentile)

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  • Snyk IDSNYK-SLES152-GLIBCINFO-2688276
  • published14 Apr 2022
  • disclosed26 Feb 2021

Introduced: 26 Feb 2021

CVE-2020-29573  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade SLES:15.2 glibc-info to version 2.26-13.56.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc-info package and not the glibc-info package as distributed by SLES. See How to fix? for SLES:15.2 relevant fixed versions and status.

sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \x00\x04\x00\x00\x00\x00\x00\x00\x00\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of "Fixed for glibc 2.33" in the 26649 reference.

CVSS Scores

version 3.1