CVE-2021-4214: debian debian_linux Classic Buffer Overflow
Vulnerability summary
CVE-2021-4214 is a medium (CVSS 5.5) Classic Buffer Overflow vulnerability in debian debian_linux. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 43% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 24-08-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 2 sources · 1 version- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.52%
Chance of exploitation in the next 30 days
Percentile
43%
Versus all other CVEs
30-day change
0.00 pp
From 0.52% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundLibpng
Maturity: poc
Exploit Reference (bugzilla.redhat.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Debian2 products
- libpng1.6All versions (No fix recorded)
- debian_linuxEOL10.0 | 11.0
Libpng1 product
- libpng1.6.0
Netapp1 product
3 vendors · 4 products
References
5 links- access.redhat.com/security/cve/CVE-2021-4214Third Party Advisory
- security.netapp.com/advisory/ntap-20221020-0001/Third Party Advisory