CVE-2025-5372 (GCVE-0-2025-5372)

Vulnerability from cvelistv5 – Published: 2025-07-04 06:01 – Updated: 2026-06-15 02:26
VLAI
Title
Libssh: incorrect return code handling in ssh_kdf() in libssh
Summary
A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions' confidentiality, integrity, and availability.
Severity
5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2025:21977 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:23024 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:20610 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24349 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25911 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2025-5372 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2369388 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
libssh libssh Affected: 0 , < 0.11.2 (semver)
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:0.9.6-16.el8_10 , < * (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 8.4 Advanced Mission Critical Update Support Unaffected: 0:0.9.4-2.el8_4.2 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
    cpe:/o:redhat:rhel_aus:8.4::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:0.9.4-2.el8_4.2 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
    cpe:/o:redhat:rhel_aus:8.4::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:0.9.6-4.el8_6.2 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.6::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:0.9.6-4.el8_6.2 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.6::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:0.9.6-13.el8_8.2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
    cpe:/o:redhat:rhel_e4s:8.8::baseos
    cpe:/o:redhat:rhel_tus:8.8::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:0.9.6-13.el8_8.2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
    cpe:/o:redhat:rhel_e4s:8.8::baseos
    cpe:/o:redhat:rhel_tus:8.8::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Unaffected: 0:0.9.6-3.el9_0.2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.0::appstream
    cpe:/o:redhat:rhel_e4s:9.0::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 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.
Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Date Public
2025-06-24 00:00
Show details on NVD website
To clipboard 

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    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.