Buffer overflow in Libpng
CVE-2021-4214
A heap overflow flaw was found in libpngs' pngimage.c program. This flaw allows an attacker with local network access to pass a specially crafted PNG file to the pngimage utility, causing an application to crash, leading to a denial of service.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.000
Affected products
- Libpng — versions 1.6.0
- NetApp Ontap Select Deploy Administration Utility
- Debian Linux — versions 10.0, 11.0
- Libpng — versions libpng v1.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/glennrp/libpng/issues/302 (Exploit, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking)
- access.redhat.com/security/cve/CVE-2021-4214 (Third Party Advisory)
- security-tracker.debian.org/tracker/CVE-2021-4214 (Third Party Advisory)
- security.netapp.com/advisory/ntap-20221020-0001/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-4214?
- CVE-2021-4214 is a medium-severity vulnerability in Libpng, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2022-08-24.
- How severe is CVE-2021-4214?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-4214 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.