CVE-2023-6004 (GCVE-0-2023-6004)

Vulnerability from cvelistv5 – Published: 2024-01-03 17:01 – Updated: 2025-11-07 00:19
VLAI?
Title
Libssh: proxycommand/proxyjump features allow injection of malicious code through hostname
Summary
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.
Severity ?
4.8 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
CWE
  • CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
References
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:0.9.6-14.el8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
    cpe:/o:redhat:enterprise_linux:8::baseos
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:0.9.6-14.el8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
    cpe:/o:redhat:enterprise_linux:8::baseos
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:0.10.4-13.el9 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:9::baseos
    cpe:/a:redhat:enterprise_linux:9::appstream
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:0.10.4-13.el9 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:9::baseos
    cpe:/a:redhat:enterprise_linux:9::appstream
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
Date Public ?
2023-12-18 00:00
Credits
Red Hat would like to thank Norbert Pocs (libssh) and vinci@protonmail.ch for reporting this issue.
Show details on NVD website
To clipboard 

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to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2023-12-18T00:00:00.000Z\", \"value\": \"Made public.\"}], \"datePublic\": \"2023-12-18T00:00:00.000Z\", \"references\": [{\"url\": \"https://access.redhat.com/errata/RHSA-2024:2504\", \"name\": \"RHSA-2024:2504\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:3233\", \"name\": \"RHSA-2024:3233\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2023-6004\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2251110\", \"name\": \"RHBZ#2251110\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://www.libssh.org/security/advisories/CVE-2023-6004.txt\"}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-74\", \"description\": \"Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2025-11-07T00:19:08.335Z\"}, \"x_redhatCweChain\": \"CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-6004\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-07T00:19:08.335Z\", \"dateReserved\": \"2023-11-07T23:07:50.073Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2024-01-03T17:01:38.672Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.