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CVE-2023-39804

18
FAUCET Score

CVE-2023-39804 is a medium-severity vulnerability affecting GNU tar versions prior to 1.35, where mishandling of extension attributes in a PAX archive can cause an application crash. With a CVSS score of 6.2, it has a local attack vector and low attack complexity, leading to a high impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.35CPE matchmatch criteria
cpe:2.3:a:gnu:tar:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.2MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
20.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 27th percentile among its peer group of 3,052 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

denopatch availablevia llm_extracted
View patch
keraspatch availablevia llm_extracted
View patch
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 1.34-3
microsoftpatch availablevia msrc
Product: 20044-17086Fixed in: 1.34-3
microsoftpatch availablevia msrc
Product: cbl2 tar 1.34-3 on CBL Mariner 2.0Fixed in: 1.34-3
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 1.34-3
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: tar
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: tar
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: tar

Vendor Advisories (5)

microsoft2024-Nov/CVE-2023-39804

CVE-2023-39804

Nov 12, 2024
denollm-deno-650ac71876afb4f8CRITICAL

HP ThinPro 8.1 SP 2 Security Updates

Apr 12, 2024
kerasllm-keras-d13bbd8768a57997CRITICAL

HP ThinPro 8.1 SP 2 Security Updates

Apr 12, 2024
microsoft2024-Mar/CVE-2023-39804Moderate

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

Mar 12, 2024
redhatCVE-2023-39804Low

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

Dec 11, 2023

References

lists.debian.org / debian-lts-announce/2024/03/msg00008.html
bugs.debian.org / cgi-bin/bugreport.cgi
Mailing List
git.savannah.gnu.org / cgit/tar.git/commit
Patch
git.savannah.gnu.org / cgit/tar.git/tree/src/xheader.c
Product