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Noroxi
NVD / CVE Program· CNA mitre

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.

Noroxi assessment

Priority: Monitor (action score 24/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.28% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: CBL Mariner 2.0 ARM 1.34-3; CBL Mariner 2.0 x64 1.34-3.

Low priority for now. Upgrade to CBL Mariner 2.0 ARM 1.34-3; CBL Mariner 2.0 x64 1.34-3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

MediumCVSS 6.2 · v3.1—No exploit Fix available
Published
Mar 27, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 20th percentile
CWE
—

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
24 / 40 · 6.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-39804

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
gnutar

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • gnu tarbefore 1.35

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10tarbefore 1.30+dfsg-6+deb10u11.30+dfsg-6+deb10u1
Debian:12tarbefore 1.34+dfsg-1.2+deb12u11.34+dfsg-1.2+deb12u1
Debian:13tarbefore 1.34+dfsg-1.31.34+dfsg-1.3
openSUSE:Leap Micro 5.3tarbefore 1.34-150000.3.34.11.34-150000.3.34.1
openSUSE:Tumbleweedtarbefore 1.35-2.11.35-2.1
SUSE:Linux Enterprise Micro 5.3tarbefore 1.34-150000.3.34.11.34-150000.3.34.1
SUSE:Linux Enterprise Server 12 SP5tarbefore 1.27.1-15.24.11.27.1-15.24.1

Same product

gnu: all records

Other highest-scoring records for the same primary product.

  • CVE-2005-2541Tar 1.15.1 does not properly warn the user when extracting setuid or setgid files, which may allow local users or remote attackers to gain p
    41Plan
  • CVE-2016-6321Directory traversal vulnerability in the safer_name_suffix function in GNU tar 1.14 through 1.29 might allow remote attackers to bypass an i
    35Monitor
  • CVE-2007-4476Buffer overflow in the safer_name_suffix function in GNU tar has unspecified attack vectors and impact, resulting in a "crashing stack."
    34Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-20193Mar 26, 2021 · A flaw was found in the src/list.c of tar 1.33 and earlier.
    13Monitor
  • ← EarlierCVE-2022-48303Jan 30, 2023 · GNU Tar through 1.34 has a one-byte out-of-bounds read that results in use of uninitialized memory for a conditional jump.
    22Monitor
  • Later →CVE-2025-45582Jul 11, 2025 · GNU Tar through 1.35 allows file overwrite via directory traversal in crafted TAR archives, with a certain two-step process.
    16Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
CBL Mariner 2.0 ARM1.34-3 · tarMicrosoft (MSRC)
CBL Mariner 2.0 x641.34-3 · tarMicrosoft (MSRC)
debian:tar1.34+dfsg-1.2+deb12u1 · Debian:12Package registry (OSV)
opensuse:tar1.34-150000.3.34.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
suse:tar1.34-150000.3.34.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records