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No exploitation reportedFix available

CVE-2023-6004

No exploitation reported by the sources we read.

  • Published2024-01-03
  • Fixed in0.10.6 · 0.9.8
  • WeaknessCWE-74

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter.

Timeline

dates in UTC
  1. 2024-01-0317:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-6004?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-6004?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Libssh
BranchAffectedFixed in
0.10≥ 0.10.0, < 0.10.60.10.6
0.x≥ 0.8.0, < 0.9.80.9.8
Redhat enterprise linux
BranchAffectedFixed in
8.0= 8.0no fix published
9.0= 9.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
38.x= 38no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA3 products

As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-11-07

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libsshWolfiall versions · fixed in 0.10.6-r0
  • libsshUbuntu:Pro:18.04:LTSall versions · fixed in 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm3
  • libsshUbuntu:Pro:16.04:LTSall versions · fixed in 0.6.3-4.3ubuntu0.6+esm1
  • libsshUbuntu:22.04:LTSall versions · fixed in 0.9.6-2ubuntu0.22.04.3
  • libsshUbuntu:20.04:LTSall versions · fixed in 0.9.3-2ubuntu2.5
  • libsshTuxCare:CentOS:8.5all versions · fixed in 0.9.4-3.el8.tuxcare.els3and 2 other packages
  • libsshTuxCare:CentOS:8.4all versions · fixed in 0.9.4-3.el8.tuxcare.els3and 2 other packages
  • libsshTuxCare:AlmaLinux:9.2all versions · fixed in 0.10.4-8.el9.tuxcare.els1and 2 other packages

59 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Libssh to 0.10.6 · 0.9.8

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2024-01-10
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.14.8known since 2026-10-23
  • NVDCVSS 3.14.8read 2026-10-23
  • CNAweakness (CWE)CWE-74known since 2026-10-23
  • NVDweakness (CWE)CWE-74read 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-11-03
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Published
2024-01-03
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-f35j-mfvw-p857

Frequently asked questions

What is CVE-2023-6004?

A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter.

Is CVE-2023-6004 actively exploited?

Active exploitation of CVE-2023-6004 has not been confirmed. Its EPSS score was 0.4% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-6004?

CVE-2023-6004 has a CVSS v3 base score of 4.8 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L.

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Sources for this record