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Out-of-Bounds Affecting libcrypt package, versions <0:2.26-28.amzn2.0.1

medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.63% (79th percentile)
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NVD
9.8 critical
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SUSE
5.3 medium
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Red Hat
7.3 high

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  • Snyk ID SNYK-AMZN2-LIBCRYPT-1664122
  • published 27 Sep 2021
  • disclosed 18 May 2018
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Introduced: 18 May 2018

CVE-2017-18269 Open this link in a new tab
CWE-119 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 libcrypt to version 0:2.26-28.amzn2.0.1 or higher.
This issue was patched in ALAS2-2018-1048.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcrypt package and not the libcrypt package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

An SSE2-optimized memmove implementation for i386 in sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S in the GNU C Library (aka glibc or libc6) 2.21 through 2.27 does not correctly perform the overlapping memory check if the source memory range spans the middle of the address space, resulting in corrupt data being produced by the copy operation. This may disclose information to context-dependent attackers, or result in a denial of service, or, possibly, code execution.