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Debian LTS Advisory DLA-3750-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                       Guilhem Moulin
March 05, 2024                                https://wiki.debian.org/LTS
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Package        : php-phpseclib
Version        : 2.0.30-2~deb10u3
CVE ID         : CVE-2024-27354 CVE-2024-27355

Security issues were discovered in php-phpseclib, a PHP library for
arbitrary-precision integer arithmetic, which could lead to Denial of
Service.

CVE-2024-27354

    An attacker can construct a malformed certificate containing an
    extremely large prime to cause a denial of service (CPU consumption
    for an `isPrime` primality check).

    This issue was introduced when attempting to fix CVE-2023-27560.

CVE-2024-27355

    When processing the ASN.1 object identifier of a certificate, a sub
    identifier may be provided that leads to a denial of service (CPU
    consumption for `decodeOID`).

For Debian 10 buster, these problems have been fixed in version
2.0.30-2~deb10u3.

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/source-package/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