Linux Security
Linux Security
Linux Security

Mageia 2021-0112: xpdf security update

Date 04 Mar 2021
152
Posted By LinuxSecurity Advisories
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 (CVE-2020-25725).
MGASA-2021-0112 - Updated xpdf packages fix security vulnerabilities

Publication date: 04 Mar 2021
URL: https://advisories.mageia.org/MGASA-2021-0112.html
Type: security
Affected Mageia releases: 7, 8
CVE: CVE-2020-25725,
     CVE-2020-35376

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 (CVE-2020-25725).

Xpdf 4.02 allows stack consumption because of an incorrect subroutine reference
in a Type 1C font charstring, related to the FoFiType1C::getOp() function
(CVE-2020-35376).

References:
- https://bugs.mageia.org/show_bug.cgi?id=28474
- https://lists.fedoraproject.org/archives/list/This email address is being protected from spambots. You need JavaScript enabled to view it./thread/VLOYVJSM54IL6I5RY4QTJGRS7PIEG44X/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25725
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-35376

SRPMS:
- 8/core/xpdf-4.03-1.mga8
- 7/core/xpdf-4.03-1.mga7

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