CVE-2020-29385
MEDIUMCVSS 5.5/10EPSS 1.48%
Last modified
CVE-2020-29385 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. GNOME gdk-pixbuf (aka GdkPixbuf) before 2.42.2 allows a denial of service (infinite loop) in lzw.c in the function write_indexes. if c->self_code equals 10, self->code_table[10].extends will assign the value 11 to c. EPSS estimates a 1.48% chance of exploitation in the next 30 days.
Description
GNOME gdk-pixbuf (aka GdkPixbuf) before 2.42.2 allows a denial of service (infinite loop) in lzw.c in the function write_indexes. if c->self_code equals 10, self->code_table[10].extends will assign the value 11 to c. The next execution in the loop will assign self->code_table[11].extends to c, which will give the value of 10. This will make the loop run infinitely. This bug can, for example, be triggered by calling this function with a GIF image with LZW compression that is crafted in a special way.
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 |
|---|---|---|
| Gnome | Gdk-Pixbuf | > 2.39.2, < 2.42.2 |
| Canonical | Ubuntu Linux | 20.04 |
| Canonical | Ubuntu Linux | 20.10 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
References
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=977166Issue Tracking, Third Party Advisory
- https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/blob/master/NEWSRelease Notes, Vendor Advisory
- https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/164Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5H3GNVWMZTYZR3JBYCK57PF7PFMQBNP/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BGZVCTH5O7WBJLYXZ2UOKLYNIFPVR55D/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EANWYODLOJDFLMBH6WEKJJMQ5PKLEWML/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202012-15Third Party Advisory
- https://ubuntu.com/security/CVE-2020-29385Patch, Third Party Advisory
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=977166Issue Tracking, Third Party Advisory
- https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/blob/master/NEWSRelease Notes, Vendor Advisory
- https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/164Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5H3GNVWMZTYZR3JBYCK57PF7PFMQBNP/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BGZVCTH5O7WBJLYXZ2UOKLYNIFPVR55D/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EANWYODLOJDFLMBH6WEKJJMQ5PKLEWML/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202012-15Third Party Advisory
- https://ubuntu.com/security/CVE-2020-29385Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2020-29385?
GNOME gdk-pixbuf (aka GdkPixbuf) before 2.42.2 allows a denial of service (infinite loop) in lzw.c in the function write_indexes. if c->self_code equals 10, self->code_table[10].extends will assign the value 11 to c. The next execution in the loop will assign self->code_table[11].extends to c, which will give the value of 10. This will make the loop run infinitely. This bug can, for example, be triggered by calling this function with a GIF image with LZW compression that is crafted in a special way.
How severe is CVE-2020-29385?
CVE-2020-29385 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.48% probability of exploitation in the next 30 days.
How do I fix CVE-2020-29385?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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