Security update for libssh

Announcement ID: SUSE-SU-2025:20596-1
Release Date: 2025-08-14T10:19:26Z
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2025-4877 ( SUSE ): 2.0 CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  • CVE-2025-4877 ( SUSE ): 4.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-4877 ( NVD ): 4.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-4878 ( SUSE ): 2.0 CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  • CVE-2025-4878 ( SUSE ): 3.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
  • CVE-2025-4878 ( NVD ): 3.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
  • CVE-2025-5318 ( SUSE ): 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  • CVE-2025-5318 ( SUSE ): 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  • CVE-2025-5318 ( NVD ): 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  • CVE-2025-5318 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
  • CVE-2025-5351 ( SUSE ): 6.1 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
  • CVE-2025-5351 ( SUSE ): 6.4 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
  • CVE-2025-5351 ( NVD ): 4.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
  • CVE-2025-5351 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • CVE-2025-5372 ( SUSE ): 7.6 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
  • CVE-2025-5372 ( SUSE ): 7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
  • CVE-2025-5372 ( NVD ): 5.0 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-5372 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2025-5987 ( SUSE ): 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  • CVE-2025-5987 ( SUSE ): 5.0 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-5987 ( NVD ): 5.0 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
  • CVE-2025-5987 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products:
  • SUSE Linux Micro 6.1

An update that solves six vulnerabilities can now be installed.

Description:

This update for libssh fixes the following issues:

  • CVE-2025-5372: ssh_kdf() returns a success code on certain failures (bsc#1245314)
  • CVE-2025-5987: Invalid return code for chacha20 poly1305 with OpenSSL backend (bsc#1245317)
  • CVE-2025-4877: Write beyond bounds in binary to base64 conversion functions (bsc#1245309)
  • CVE-2025-4878: Use of uninitialized variable in privatekey_from_file() (bsc#1245310)
  • CVE-2025-5318: Likely read beyond bounds in sftp server handle management (bsc#1245311)
  • CVE-2025-5351: Double free in functions exporting keys (bsc#1245312)

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Micro 6.1
    zypper in -t patch SUSE-SLE-Micro-6.1-213=1

Package List:

  • SUSE Linux Micro 6.1 (aarch64 ppc64le x86_64)
    • libssh4-0.10.6-slfo.1.1_2.1
    • libssh-config-0.10.6-slfo.1.1_2.1
    • libssh4-debuginfo-0.10.6-slfo.1.1_2.1
    • libssh-debugsource-0.10.6-slfo.1.1_2.1

References: