Improper Input Validation Affecting squid-debuginfo package, versions <7:3.5.20-17.amzn2.7.10


Severity

Recommended
critical

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.49% (77th percentile)

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  • Snyk IDSNYK-AMZN2-SQUIDDEBUGINFO-6037088
  • published27 Oct 2023
  • disclosed15 Apr 2020

Introduced: 15 Apr 2020

CVE-2019-12524  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 squid-debuginfo to version 7:3.5.20-17.amzn2.7.10 or higher.
This issue was patched in ALAS2-2023-2318.

NVD Description

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

An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource.

CVSS Scores

version 3.1