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Mageia 8 - MGASA-2022-0052 Critical: Glibc Buffer Overflow Risk

mageia
Calendar Grey February 8, 2022
Dist Mageia Esm H88
The Fedora security bulletin highlights an important OpenSSL patch that resolves a vulnerability causing potential data leaks.
Updated glibc packages fix security vulnerability: An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1

Summary

Updated glibc packages fix security vulnerability:
An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system (CVE-2021-3999).
Other upstream fixes in this update: - gconv: Do not emit spurious NUL character in ISO-2022-JP-3 [BZ #28524] - x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ #28755] - x86: Set Prefer_No_VZEROUPPER and add Prefer_AVX2_STRCMP - x86-64: Add ifunc-avx2.h functions with 256-bit EVEX - x86-64: Add strcpy family functions with 256-bit EVEX - x86-64: Add memmove family functions with 256-bit EVEX - x86-64: Add memset family functions with 256-bit EVEX - x86-64: Add memcmp family functions with 256-bit EVEX - x86-64: Add AVX optimized string/memory functions for RTM - x86: Add string/memory function tes...

Read the Full Advisory

References

- https://bugs.mageia.org/show_bug.cgi?id=29935

- https://www.cve.org/CVERecord?id=CVE-2021-3999

Resolution

SRPMS

- 8/core/glibc-2.32-25.mga8

Severity
critical
Lowest
Low
Medium
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Critical

Publication date: 08 Feb 2022
URL: https://advisories.mageia.org/MGASA-2022-0052.html
Type: security
CVE: CVE-2021-3999

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