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Fencer Vulns
medium 6.2

CVE-2023-39804 json

In GNU tar before 1.35, mishandled extension attributes in a PAX archive can lead to an application crash in xheader.c.

published 2024-03-27 2 y ago modified 2026-07-18 3 mo ago also EUVD-2023-43504 , JLSEC-2026-185

cvss
6.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

In GNU tar before 1.35, mishandled extension attributes in a PAX archive can lead to an application crash in xheader.c.

Patch / fix

  • julia Tar_jll 1.35.0+0
  • gnu tar 1.35
  • tar Debian 12 1.34+dfsg-1.2+deb12u1
  • tar Debian 14, Debian 13 1.34+dfsg-1.3

debian advisories DEBIAN-CVE-2023-39804

  • tar Ubuntu 20.04 LTS 1.30+dfsg-7ubuntu0.20.04.4
  • tar Ubuntu 22.04 LTS 1.34+dfsg-1ubuntu0.1.22.04.2
  • tar Ubuntu Pro 14.04 LTS 1.27.1-1ubuntu0.1+esm4
  • tar Ubuntu Pro 16.04 LTS 1.28-2.1ubuntu0.2+esm3
  • tar Ubuntu Pro 18.04 LTS 1.29b-2ubuntu0.4+esm1

ubuntu advisories UBUNTU-CVE-2023-39804

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

  • tar SLES for SAP 12 SP5, SLES 12 SP5 1.27.1-15.24.1
  • tar SLE Module for Basesystem 15 SP5, SLE Module for Basesystem 15 SP4, SLE Micro 5.5 +8 more 1.34-150000.3.34.1

suse advisories SUSE-SU-2024:0071-1SUSE-SU-2024:0070-2SUSE-SU-2024:0070-1

  • tar openSUSE Tumbleweed 1.35-2.1

opensuse advisories openSUSE-SU-2024:13751-1

  • tar CBL-Mariner 2.0 1.34-3

azure linux advisories AZL-52625

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2023-39804 updated cvss 3.3

tar: Incorrectly handled extension attributes in PAX archives can lead to a crash

  • Red Hat Enterprise Linux 6 tar Red Hat Enterprise Linux 7 tar Red Hat Enterprise Linux 8 tar Red Hat Enterprise Linux 9 tar Red Hat Enterprise Linux 10 tar
    affected: workaround, no fix available “Do not process untrusted tar archives.”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-dashboard-rhel9
    under investigation

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
partial
Assessed
2 y ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia Tar_jll
<1.35.0+0
1.35.0+0

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.