Use After Free Affecting xpdf package, versions <4.03-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.09% (39th percentile)

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  • Snyk IDSNYK-ALPINE321-XPDF-8490242
  • published6 Dec 2024
  • disclosed21 Nov 2020

Introduced: 21 Nov 2020

CVE-2020-25725  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 xpdf to version 4.03-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xpdf package and not the xpdf package as distributed by Alpine. See How to fix? for Alpine:3.21 relevant fixed versions and status.

In Xpdf 4.02, SplashOutputDev::endType3Char(GfxState *state) SplashOutputDev.cc:3079 is trying to use the freed t3GlyphStack-&gt;cache, which causes an heap-use-after-free problem. The codes of a previous fix for nested Type 3 characters wasn't correctly handling the case where a Type 3 char referred to another char in the same Type 3 font.

CVSS Scores

version 3.1