Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xpdfreader | Xpdf | 4.02 |
| Fedoraproject | Fedora | 32 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25725ExploitIssue TrackingThird Party Advisory
- https://forum.xpdfreader.com/viewtopic.php?f=3&t=41915ExploitVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25725ExploitIssue TrackingThird Party Advisory
- https://forum.xpdfreader.com/viewtopic.php?f=3&t=41915ExploitVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
FAQ
What is CVE-2020-25725?
CVE-2020-25725 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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 pre...
How severe is CVE-2020-25725?
CVE-2020-25725 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-25725?
Check the references section above for vendor advisories and patch information. Affected products include: Xpdfreader Xpdf, Fedoraproject Fedora.