PT-2020-16170 · Xpdf+1 · Xpdf+1
Mike Zhang
·
Published
2020-11-21
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Updated
2023-12-13
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CVE-2020-25725
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Xpdf version 4.02
Description
The issue arises in the
SplashOutputDev::endType3Char(GfxState *state) function, where it attempts to use the freed t3GlyphStack->cache, resulting in a heap-use-after-free problem. This occurs because the previous fix for nested Type 3 characters did not correctly handle cases where a Type 3 character refers to another character in the same Type 3 font.Recommendations
For Xpdf version 4.02, consider disabling the
SplashOutputDev::endType3Char function as a temporary workaround until a patch is available. Restrict access to Type 3 fonts to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.Exploit
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Xpdf