Write-what-where Condition Affecting compat-libtiff3 package, versions <0:3.9.4-12.amzn2.0.6


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-AMZN2-COMPATLIBTIFF3-13557881
  • published16 Oct 2025
  • disclosed23 Sept 2025

Introduced: 23 Sep 2025

CVE-2025-9900  (opens in a new tab)
CWE-123  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 compat-libtiff3 to version 0:3.9.4-12.amzn2.0.6 or higher.
This issue was patched in ALAS2-2025-3021.

NVD Description

Note: Versions mentioned in the description apply only to the upstream compat-libtiff3 package and not the compat-libtiff3 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A flaw was found in Libtiff. This vulnerability is a "write-what-where" condition, triggered when the library processes a specially crafted TIFF image file.

By providing an abnormally large image height value in the file's metadata, an attacker can trick the library into writing attacker-controlled color data to an arbitrary memory location. This memory corruption can be exploited to cause a denial of service (application crash) or to achieve arbitrary code execution with the permissions of the user.

References

CVSS Base Scores

version 3.1