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CVE-2020-25725

Type: 
Use After Free
Severity: 
Medium
Publication date: 
11/21/2020
Last modified: 
12/03/2020
Description
In Xpdf 4.02, SplashOutputDev::endType3Char(GfxState *state) SplashOutputDev.cc:3079 is trying to use the freed `t3GlyphStack->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.
Impact
Access Vector: Through network
Access Complexity: Media
Authentication: Not required to exploit
Impact Type: No impact on system integrity + No impact on system confidentiality + Partially affects on system availability
Vulnerable software and versions
  • cpe:2.3:a:xpdfreader:xpdf:4.02:*:*:*:*:*:*:*
To consult the complete list of products and versions see this page
References to Advisories, Solutions, and Tools
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