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Fencer Vulns
high 7.8

CVE-2021-34055 json

jhead 3.06 is vulnerable to Buffer Overflow via exif.c in function Put16u.

published 2022-11-04 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-20725

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

jhead 3.06 is vulnerable to Buffer Overflow via exif.c in function Put16u.

Patch / fix

  • jhead Debian 14, Debian 13, Debian 12 1:3.06.0.1-5

debian advisories DEBIAN-CVE-2021-34055

  • jhead Ubuntu 18.04 LTS 1:3.00-8~ubuntu0.2
  • jhead Ubuntu 20.04 LTS 1:3.04-1ubuntu0.2
  • jhead Ubuntu 22.04 LTS 1:3.06.0.1-2ubuntu0.22.04.1
  • jhead Ubuntu Pro 14.04 LTS 1:2.97-1+deb8u2ubuntu0.1~esm2
  • jhead Ubuntu Pro 16.04 LTS 1:3.00-4+deb9u1ubuntu0.1~esm2

ubuntu advisories UBUNTU-CVE-2021-34055

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • jhead openSUSE Tumbleweed 3.06.0.1-3.1
  • jhead Package Hub 15 SP3, openSUSE Leap 15.3 3.00-bp153.3.6.1
  • jhead Package Hub 15 SP4, openSUSE Leap 15.4 3.06.0.1-bp154.2.6.1

opensuse advisories openSUSE-SU-2024:12499-1openSUSE-SU-2022:10203-1openSUSE-SU-2022:10202-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-34055 updated cvss 5.5

jhead: heap-buffer-overflow of exif.c

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
18 mo ago

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/Matthias-Wandel/jhead/issues/36 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.