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Debian DSA-5600-1: Severely Impacted php-phpseclib by Terrapin Attack

Fabian Baeumer, Marcus Brinkmann and Joerg Schwenk discovered that the SSH protocol is prone to a prefix truncation attack, known as the "Terrapin attack". This attack allows a MITM attacker to effect a limited break of the integrity of the early encrypted SSH transport . - ------------------------------------------------------------------------- Debian Security Advisory DSA-5600-1 This email address is being protected from spambots. You need JavaScript enabled to view it. https://www.debian.org/security/ Sebastien Delafond January 12, 2024 https://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : php-phpseclib CVE ID : CVE-2023-48795 Fabian Baeumer, Marcus Brinkmann and Joerg Schwenk discovered that the SSH protocol is prone to a prefix truncation attack, known as the "Terrapin attack". This attack allows a MITM attacker to effect a limited break of the integrity of the early encrypted SSH transport protocol by sending extra messages prior to the commencement of encryption, and deleting an equal number of consecutive messages immediately after encryption starts. Details can be found at https://terrapin-attack.com/ For the oldstable distribution (bullseye), this problem has been fixed in version 2.0.30-2+deb11u1. For the stable distribution (bookworm), this problem has been fixed in version 2.0.42-1+deb12u1. 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 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: This email address is being protected from spambots. You need JavaScript enabled to view it. . Keep informed about Advisory DSA-5600-1 concerning php-phpseclib, focusing on vulnerabilities in SSH Terrapin exploits and proposed remediation measures.. php-phpseclib, SSHProtocol, security advisory, Debian Update, Terrapin Attack. . Severity: Critical. LinuxSecurity.com Team

Jan 12, 2024 •Critical Debian