CVE-2020-25725
Last modified
CVE-2020-25725 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.99% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Xpdfreader | Xpdf | 4.02 |
| Fedoraproject | Fedora | 32 |
| Fedoraproject | Fedora | 33 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25725Exploit, Issue Tracking, Third Party Advisory
- https://forum.xpdfreader.com/viewtopic.php?f=3&t=41915Exploit, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZUU5QG6SSVRTKZTR3A72LDRVZETEI63/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLOYVJSM54IL6I5RY4QTJGRS7PIEG44X/Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25725Exploit, Issue Tracking, Third Party Advisory
- https://forum.xpdfreader.com/viewtopic.php?f=3&t=41915Exploit, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZUU5QG6SSVRTKZTR3A72LDRVZETEI63/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLOYVJSM54IL6I5RY4QTJGRS7PIEG44X/Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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