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CVE-2023-6004

19
FAUCET Score

CVE-2023-6004 is a medium-severity vulnerability in libssh, affecting various Fedora and Red Hat Enterprise Linux products. It allows for malicious code injection via unchecked hostname syntax when using ProxyCommand or ProxyJump features. The attack requires local access and user interaction, potentially leading to low impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion beyond a single media mention.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.8.0, < 0.9.8CPE matchmatch criteria
cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
>= 0.10.0, < 0.10.6CPE matchmatch criteria
cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
38CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
1.3
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
36.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0045 is in the 74th percentile among its peer group of 382 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

denopatch availablevia llm_extracted
View patch
keraspatch availablevia llm_extracted
View patch
microsoftpatch availablevia msrc
Product: 20073-17084Fixed in: 0.10.6-1
microsoftpatch availablevia msrc
Product: azl3 libssh 0.10.5-2 on Azure Linux 3.0Fixed in: 0.10.6-1
microsoftpatch availablevia msrc
Product: 18214-17084Fixed in: 0.10.6-1
microsoftpatch availablevia msrc
Product: azl3 libssh 0.10.6-1 on Azure Linux 3.0Fixed in: 0.10.6-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libssh-0:0.9.6-14.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: libssh-0:0.10.4-13.el9
View patch
redhatvendor investigatingvia nvd_reference
View patch

Vendor Advisories (4)

denollm-deno-b67a3af2ce0be075CRITICAL

HP ThinPro 8.0 SP 9 Security Updates

Jun 17, 2024
kerasllm-keras-7d8c31fee70361dcCRITICAL

HP ThinPro 8.0 SP 9 Security Updates

Jun 17, 2024
microsoft2024-Jan/CVE-2023-6004Moderate

Libssh: proxycommand/proxyjump features allow injection of malicious code through hostname

Jan 9, 2024
redhatCVE-2023-6004Low

libssh: ProxyCommand/ProxyJump features allow injection of malicious code through hostname

Dec 18, 2023

References

lists.fedoraproject.org / archives/list/[email protected]/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM
lists.fedoraproject.org / archives/list/[email protected]/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB
security.netapp.com / advisory/ntap-20240223-0004
access.redhat.com / errata/RHSA-2024:2504
access.redhat.com / errata/RHSA-2024:3233
access.redhat.com / security/cve/CVE-2023-6004
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
libssh.org / security/advisories/CVE-2023-6004.txt
Mailing List