CVE-2020-21048
MEDIUMCVSS 6.5/10EPSS 1.33%
Last modified
CVE-2020-21048 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An issue in the dither.c component of libsixel prior to v1.8.4 allows attackers to cause a denial of service (DOS) via a crafted PNG file.. EPSS estimates a 1.33% chance of exploitation in the next 30 days.
Description
An issue in the dither.c component of libsixel prior to v1.8.4 allows attackers to cause a denial of service (DOS) via a crafted PNG file.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Saitoha | Libsixel | < 1.8.4 |
References
- https://github.com/saitoha/libsixel/blob/master/ChangeLogRelease Notes, Third Party Advisory
- https://github.com/saitoha/libsixel/commit/cb373ab6614c910407c5e5a93ab935144e62b037Patch, Third Party Advisory
- https://github.com/saitoha/libsixel/issues/73Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/saitoha/libsixel/releases/tag/v1.8.4Release Notes, Third Party Advisory
- https://github.com/saitoha/libsixel/blob/master/ChangeLogRelease Notes, Third Party Advisory
- https://github.com/saitoha/libsixel/commit/cb373ab6614c910407c5e5a93ab935144e62b037Patch, Third Party Advisory
- https://github.com/saitoha/libsixel/issues/73Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/saitoha/libsixel/releases/tag/v1.8.4Release Notes, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-21048?
An issue in the dither.c component of libsixel prior to v1.8.4 allows attackers to cause a denial of service (DOS) via a crafted PNG file.
How severe is CVE-2020-21048?
CVE-2020-21048 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.
How do I fix CVE-2020-21048?
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.
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Are you affected by CVE-2020-21048?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST