Write beyond bounds in binary to base64 conversion functions

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02281-1 advisory.

    - CVE-2025-4877: Fixed write beyond bounds in binary to base64 conversion functions (bsc#1245309).
    - CVE-2025-4878: Fixed use of uninitialized variable in privatekey_from_file() (bsc#1245310).
    - CVE-2025-5318: Fixed likely read beyond bounds in sftp server handle management (bsc#1245311).
    - CVE-2025-5372: Fixed ssh_kdf() returns a success code on certain failures (bsc#1245314).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02279-1 advisory.

    - CVE-2025-4877: Fixed write beyond bounds in binary to base64 conversion functions (bsc#1245309).
    - CVE-2025-4878: Fixed use of uninitialized variable in privatekey_from_file() (bsc#1245310).
    - CVE-2025-5318: Fixed likely read beyond bounds in sftp server handle management (bsc#1245311).
    - CVE-2025-5372: Fixed ssh_kdf() returns a success code on certain failures (bsc#1245314).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02278-1 advisory.

    - CVE-2025-4877: Fixed write beyond bounds in binary to base64 conversion functions (bsc#1245309).
    - CVE-2025-4878: Fixed use of uninitialized variable in privatekey_from_file() (bsc#1245310).
    - CVE-2025-5318: Fixed likely read beyond bounds in sftp server handle management (bsc#1245311).
    - CVE-2025-5372: Fixed ssh_kdf() returns a success code on certain failures (bsc#1245314).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 24.10 / 25.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7619-1 advisory.

    Ronald Crane discovered that libssh incorrectly handled certain base64 conversions. An attacker could use     this issue to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2025-4877)

    Ronald Crane discovered that libssh incorrectly handled the privatekey_from_file() function. An attacker     could use this issue to cause libssh to crash, resulting in a denial of service, or possibly execute     arbitrary code. (CVE-2025-4878)

    Ronald Crane discovered that libssh incorrectly handled certain memory operations in the sftp server. An     attacker could possibly use this issue to cause libssh to crash, resulting in a denial of service.
    (CVE-2025-5318, CVE-2025-5449)

    Ronald Crane discovered that libssh incorrectly handled exporting keys. An attacker could possibly use     this issue to cause libssh to crash, resulting in a denial of service. This issue only affected Ubuntu     24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2025-5351)

    Ronald Crane discovered that libssh incorrectly handled the ssh_kdf() function. An attacker could use this     issue to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2025-5372)

    Ronald Crane discovered that libssh incorrectly handled the ChaCha20 cipher. An attacker could possibly     use this issue to cause libssh to use partially initialized cypher content. This issue only affected     Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2025-5987)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02229-1 advisory.

    - CVE-2025-5318: Fixed likely read beyond bounds in sftp server handle management (bsc#1245311).
    - CVE-2025-4877: Fixed write beyond bounds in binary to base64 conversion functions (bsc#1245309).
    - CVE-2025-4878: Fixed use of uninitialized variable in privatekey_from_file() (bsc#1245310).
    - CVE-2025-5372: Fixed cases where ssh_kdf() returns a success code on certain failures (bsc#1245314).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of libssh installed on the remote host is prior to 0.11.2. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2025-175-01 advisory.

    New libssh packages are available for Slackware 15.0 and -current to fix security issues.

Tenable has extracted the preceding description block directly from the libssh security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
242013	SUSE SLES12 Security Update : libssh (SUSE-SU-2025:02281-1)	Nessus	SuSE Local Security Checks	medium
241965	SUSE SLES15 Security Update : libssh (SUSE-SU-2025:02279-1)	Nessus	SuSE Local Security Checks	medium
241960	SUSE SLES15 Security Update : libssh (SUSE-SU-2025:02278-1)	Nessus	SuSE Local Security Checks	medium
241506	Ubuntu 22.04 LTS / 24.04 LTS / 24.10 / 25.04 : libssh vulnerabilities (USN-7619-1)	Nessus	Ubuntu Local Security Checks	medium
241379	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : libssh (SUSE-SU-2025:02229-1)	Nessus	SuSE Local Security Checks	medium
240488	Slackware Linux 15.0 / current libssh Multiple Vulnerabilities (SSA:2025-175-01)	Nessus	Slackware Local Security Checks	medium

Detections

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CVE-2025-4877

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Tenable Plugins

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medium