Vulnerability in Libssh
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.
EPSS: 0.004 (36.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L.
Affected products
- Libssh
- Fedoraproject Fedora — versions 38
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 0:0.9.6-14.el8
- Red Hat Enterprise Linux 9 — versions 0:0.10.4-13.el9
- Redhat Enterprise_linux — versions 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Issue Tracking)
- secalert@redhat.com (Mailing List)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-6004?
- CVE-2023-6004 is a medium-severity vulnerability in Libssh, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 4.8/10. Published 2024-01-03.
- How severe is CVE-2023-6004?
- Medium severity. CVSS v3 base score is 4.8 out of 10.
- Is CVE-2023-6004 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.