CVE-2023-39804

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 Last update: 2025-11-04 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-39804 is rated Low Risk (28.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.04%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-39804

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-29 0.07% 0.04% -0.03%
2 2026-01-01 0.04% 0.07% +0.03%
3 2025-11-21 — 0.04% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-39804

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.2 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.5 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-39804

OS Trackers for CVE-2023-39804

vendor priority summary link
alpine — CVE-2023-39804: 1 source package rows (tar); 23 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 0, open 23. https://security.alpinelinux.org/vuln/CVE-2023-39804
debian not yet assigned CVE-2023-39804 not yet assigned priority: Debian including 1 source packages (tar), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-39804
redhat low — https://access.redhat.com/security/cve/CVE-2023-39804
suse low CVE-2023-39804 severity low: SUSE including 277 source package names (0.23.1-12.3:tar-1.34-150000.3.34.1, 1.1.1.23.352:tar-1.34-150000.3.34.1, …), 591 product×package rows across 325 product lines (Container bci/bci-sle15-kernel-module-devel, Container bci/kiwi, … (325 product lines)): Fixed 396, Known Affected 195. https://www.suse.com/security/cve/CVE-2023-39804/
ubuntu medium CVE-2023-39804 medium priority: Ubuntu including 1 source packages (tar), 8 status rows across 8 suites (bionic, focal, jammy, lunar, mantic, trusty, upstream, xenial): released 7, needed 1. https://ubuntu.com/security/CVE-2023-39804

Affected software / configurations for CVE-2023-39804

Vendor Product Version Raw CPE
gnu tar < 1.35 cpe:2.3:a:gnu:tar:*:*:*:*:*:*:*:*

References for CVE-2023-39804

cvelogic Threat Intelligence