CVE-2023-6004
Libssh: proxycommand/proxyjump features allow injection of malicious code through hostname
At a glance
- Severity
- MEDIUM 4.8
- EPSS
- EPSS 0.45 % · percentile 39 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Modified
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.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 4.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L | redhat |
| CVSS 3.1 | MEDIUM 4.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | MEDIUM 4.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L | NVD · nvd@nist.gov (Primary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2023-58271
- GCVE · GCVE-0-2023-6004
CERT-FR advisories
- CERTFR-2025-AVI-0969 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0864 — Multiples vulnérabilités dans VMware Tanzu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0855 — Multiples vulnérabilités dans les produits Juniper Networks · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0958 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0741 — Multiples vulnérabilités dans Juniper Secure Analytics · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0585 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0579 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*≥ 0.8.0 < 0.9.8cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*≥ 0.10.0 < 0.10.6cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Red Hat · Red Hat Enterprise Linux 8 | unaffected 0:0.9.6-14.el8 < * |
| Red Hat · Red Hat Enterprise Linux 8 | unaffected 0:0.9.6-14.el8 < * |
| Red Hat · Red Hat Enterprise Linux 9 | unaffected 0:0.10.4-13.el9 < * |
| Red Hat · Red Hat Enterprise Linux 9 | unaffected 0:0.10.4-13.el9 < * |
| Red Hat · Red Hat Enterprise Linux 7 |
References
- https://access.redhat.com/errata/RHSA-2024:2504
- https://access.redhat.com/errata/RHSA-2024:3233
- https://access.redhat.com/security/cve/CVE-2023-6004
- https://bugzilla.redhat.com/show_bug.cgi?id=2251110
- https://www.libssh.org/security/advisories/CVE-2023-6004.txt
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM/
- https://security.netapp.com/advisory/ntap-20240223-0004/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB/
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |