Buffer overflow in Libpng Pngcheck
CVE-2020-27818
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.012 (67.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: +0.000
Affected products
- Libpng Pngcheck — versions 2.4.0
- Debian Linux — versions 9.0
- Fedoraproject Extra Packages For Enterprise Linux — versions 7.0, 8.0
- Fedoraproject Fedora — versions 31, 32, 33
- Pngcheck — versions pngcheck-2.4.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bodhi.fedoraproject.org/updates/FEDORA-2020-04d5e1ce26 (Third Party Advisory)
- bodhi.fedoraproject.org/updates/FEDORA-2020-4349e95c4f (Third Party Advisory)
- bodhi.fedoraproject.org/updates/FEDORA-2020-23432b7b72 (Third Party Advisory)
- bodhi.fedoraproject.org/updates/FEDORA-2020-27b168926a (Third Party Advisory)
- bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-6c93c61069 (Third Party Advisory)
- bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-339db397ad (Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- lists.debian.org/debian-lts-announce/2022/05/msg00043.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-27818?
- CVE-2020-27818 is a low-severity vulnerability in Libpng Pngcheck, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 3.3/10. Published 2020-12-08.
- How severe is CVE-2020-27818?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2020-27818 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.