Out-of-bounds Write Affecting squid package, versions <7:3.5.20-15.39.amzn1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
6% (94th percentile)

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  • Snyk IDSNYK-AMZN201803-SQUID-1721872
  • published27 Sept 2021
  • disclosed11 Jul 2019

Introduced: 11 Jul 2019

CVE-2019-12525  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 squid to version 7:3.5.20-15.39.amzn1 or higher.
This issue was patched in ALAS-2020-1386.

NVD Description

Note: Versions mentioned in the description apply only to the upstream squid package and not the squid package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.

CVSS Scores

version 3.1