There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject
    Alternative Name fields in TLS certificates are incorrectly allowed to have a special meaning in regular
    expressions (such as a + wildcard), leading to name confusion in X.509 certificate host verification.
    (CVE-2023-52892)

The remote Debian 12 / 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6186 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6186-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     March 29, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : php-phpseclib     CVE ID         : CVE-2026-32935

    It was discovered that the AES-CBC implementation in the PHP Secure     Communications Library was susceptible to a padding oracle timing attack.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 2.0.42-1+deb12u3. This update also fixes CVE-2023-52892.

    For the stable distribution (trixie), these problems have been fixed in     version 2.0.48-3+deb13u1.

    We recommend that you upgrade your php-phpseclib packages.

    For the detailed security status of php-phpseclib please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/php-phpseclib

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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 Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-91d6e174d9 advisory.

    Security fix for CVE-2023-52892, CVE-2024-27354

Tenable has extracted the preceding description block directly from the Fedora 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 Fedora 40 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-b38cbff99d advisory.

    Security fix for CVE-2023-52892, CVE-2024-27354

Tenable has extracted the preceding description block directly from the Fedora 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 Debian 12 / 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6185 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6185-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     March 29, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : phpseclib     CVE ID         : CVE-2026-32935

    It was discovered that the AES-CBC implementation in the PHP Secure     Communications Library was susceptible to a padding oracle timing attack.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 1.0.20-1+deb12u3. This update also fixes CVE-2023-52892.

    For the stable distribution (trixie), these problems have been fixed in     version 1.0.23-6+deb13u1.

    We recommend that you upgrade your phpseclib packages.

    For the detailed security status of phpseclib please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/phpseclib

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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 Debian 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4670 advisory.

    - -----------------------------------------------------------------------     Debian LTS Advisory DLA-4670-1              debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Utkarsh Gupta     July 05, 2026                               https://wiki.debian.org/LTS
    - -----------------------------------------------------------------------

    Package        : php-phpseclib     Version        : 2.0.30-2+deb11u3     CVE ID         : CVE-2023-52892 CVE-2026-32935 CVE-2026-40194                      CVE-2026-44167 CVE-2026-55599     Debian Bug     : 1131483

    Several vulnerabilities were discovered in phpseclib, a PHP secure     communications library, which could result in hostname validation     bypass, timing side-channel attacks, denial of service, and     server-side request forgery (SSRF).

    CVE-2023-52892

        X509.php did not properly escape regular expression special         characters in a certificate's subjectAltName, allowing a crafted         certificate to bypass hostname validation in validateURL().

    CVE-2026-32935

        The block cipher unpadding routine in Crypt/Base.php used a         short-circuiting comparison, creating a timing side channel that         could aid padding-oracle-style attacks.

    CVE-2026-40194

        The SSH2 implementation compared incoming packet HMACs using a         variable-time string comparison, creating a timing side channel         on cryptographic material.

    CVE-2026-44167

        The ASN.1 decoder's 4096-byte Object Identifier limit (mitigating         CVE-2024-27355) was still large enough to allow an OID         amplification denial of service via crafted ASN.1 structures.

    CVE-2026-55599

        File_X509 could automatically fetch a URL from a certificate's         Authority Information Access extension without validating the         destination, allowing SSRF via a crafted certificate.

    For Debian 11 bullseye, these problems have been fixed in version     2.0.30-2+deb11u3.

    We recommend that you upgrade your php-phpseclib packages.

    For the detailed security status of php-phpseclib please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/php-phpseclib

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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 Debian 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4518 advisory.

    - -----------------------------------------------------------------------     Debian LTS Advisory DLA-4518-1              debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Utkarsh Gupta     March 30, 2026                              https://wiki.debian.org/LTS
    - -----------------------------------------------------------------------

    Package        : phpseclib     Version        : 1.0.19-3+deb11u3     CVE ID         : CVE-2023-52892 CVE-2026-32935

    Two vulnerabilities were discovered in phpseclib, a PHP Secure     Communications Library.

    CVE-2023-52892

        Some characters in Subject Alternative Name fields in TLS         certificates were incorrectly allowed to have a special meaning         in regular expressions, leading to name confusion in X.509         certificate host verification.

    CVE-2026-32935

        The AES-CBC implementation was susceptible to a padding oracle         timing attack due to the use of a short-circuiting logical         operator in the unpadding function.

    For Debian 11 bullseye, these problems have been fixed in version     1.0.19-3+deb11u3.

    We recommend that you upgrade your phpseclib packages.

    For the detailed security status of phpseclib please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/phpseclib

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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 Debian 12 / 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6187 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6187-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     March 29, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : php-phpseclib3     CVE ID         : CVE-2026-32935

    It was discovered that the AES-CBC implementation in the PHP Secure     Communications Library was susceptible to a padding oracle timing attack.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 3.0.19-1+deb12u4. This update also fixes CVE-2023-52892.

    For the stable distribution (trixie), these problems have been fixed in     version 3.0.43-2+deb13u1.

    We recommend that you upgrade your php-phpseclib3 packages.

    For the detailed security status of php-phpseclib3 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/php-phpseclib3

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7404-1 advisory.

    It was discovered that phpseclib did not correctly handle RSA PKCS#1 v1.5 signature verification. An     attacker could possibly use this issue to bypass authentication. This issue only affected Ubuntu 20.04     LTS. (CVE-2021-30130)

    It was discovered that phpseclib did not correctly handle certain characters in certain TLS fields, which     could lead to name confusion. An attacker could possibly use this issue to bypass authentication.
    (CVE-2023-52892)

    It was discovered that phpseclib incorrectly limited the size of prime numbers generated by isPrime. An     attacker could possibly use this issue to cause a denial of service. (CVE-2024-27354)

    It was discovered that phpseclib did not correctly handle processing the ASN.1 object identifier of a     certificate. An attacker could possibly use this issue to cause a denial of service. This issue only     affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-27355)

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.

ID	Name	Product	Family	Published	Updated	Severity
414466	SCA: security update for phpseclib/phpseclib (GHSA-ff7q-6vwh-v9m4)	Tenable Cloud Security	SCA Checks	1/23/2025	7/2/2026	high
414466	SCA: security update for phpseclib/phpseclib (GHSA-ff7q-6vwh-v9m4)	Tenable Self-Hosted Container Security	SCA Checks	1/23/2025	7/2/2026	high
304246	Debian dsa-6186 : php-phpseclib - security update	Nessus	Debian Local Security Checks	3/29/2026	3/29/2026	high
215152	Fedora 41 : php-phpseclib (2025-91d6e174d9)	Nessus	Fedora Local Security Checks	2/8/2025	10/23/2025	high
215157	Fedora 40 : php-phpseclib (2025-b38cbff99d)	Nessus	Fedora Local Security Checks	2/9/2025	10/23/2025	high
304247	Debian dsa-6185 : php-seclib - security update	Nessus	Debian Local Security Checks	3/29/2026	3/29/2026	high
325133	Debian dla-4670 : php-phpseclib - security update	Nessus	Debian Local Security Checks	7/6/2026	7/6/2026	high
304326	Debian dla-4518 : php-seclib - security update	Nessus	Debian Local Security Checks	3/30/2026	3/30/2026	high
304245	Debian dsa-6187 : php-phpseclib3 - security update	Nessus	Debian Local Security Checks	3/29/2026	4/5/2026	high
233753	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : phpseclib vulnerabilities (USN-7404-1)	Nessus	Ubuntu Local Security Checks	4/2/2025	9/3/2025	high

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