Buffer overflow in pngcheck
Priority LOW 18CWE-120Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A flaw was found in the check_chunk_name() function of pngcheck-2.4.0. An attacker able to pass a malicious file to be processed by pngcheck could cause a temporary denial of service, posing a low risk to application availability.
Why it matters now
EPSS 0.01218 68th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | pngcheck | pngcheck-2.4.0 | — | No fix listed | CNA |
- pngcheck Vendor— Affected pngcheck-2.4.0 Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libpng:pngcheck:2.4.0:*:*:*:*:*:*:* | 2.4.0 | Vulnerable | pnggroup |
| cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Fedoraproject |
| cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
- cpe:2.3:a:libpng:pngcheck:2.4.0:*:*:*:*:*:*:* Versions 2.4.0 Vulnerable ·pnggroup
- cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Fedoraproject
- cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27818
- 2026-10-03 Alias added: GHSA-xjm9-9gr6-gcpx
References
Advisory 8
- https://bodhi.fedoraproject.org/updates/FEDORA-2020-04d5e1ce26
- https://bodhi.fedoraproject.org/updates/FEDORA-2020-4349e95c4f
- https://bodhi.fedoraproject.org/updates/FEDORA-2020-23432b7b72
- https://bodhi.fedoraproject.org/updates/FEDORA-2020-27b168926a
- https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-6c93c61069
- https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-339db397ad
- https://bugzilla.redhat.com/show_bug.cgi?id=1902011
- [debian-lts-announce] 20220529 [SECURITY] [DLA 3032-1] pngcheck security update
Sources
- CVE-2020-27818 · CVE Program
- CVE-2020-27818 · NVD
- FIRST EPSS
- GHSA-xjm9-9gr6-gcpx · GitHub Advisory Database · CC BY 4.0
- CVE-2020-27818 · Red Hat security data · CC BY 4.0
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