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Mageia 8 MGASA-2021-0571 Critical: OLM Buffer Overflow Mitigation

Updated olm packages fix security vulnerability: The olm_session_describe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. The Olm session object represents a cryptographic channel between two parties. Therefore, its state is . MGASA-2021-0571 - Updated olm packages fix security vulnerability Publication date: 19 Dec 2021 URL: https://advisories.mageia.org/MGASA-2021-0571.html Type: security Affected Mageia releases: 8 CVE: CVE-2021-44538 Updated olm packages fix security vulnerability: The olm_session_describe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. The Olm session object represents a cryptographic channel between two parties. Therefore, its state is partially controllable by the remote party of the channel. Attackerscan construct a crafted sequence of messages to manipulate the state of the receiver's session in such a way that, for some buffer sizes, a buffer overflow happens on a call to olm_session_describe. Furthermore, safe buffer sizes were undocumented. The overflow content is partially controllable by the attacker and limited to ASCII spaces and digits (CVE-2021-44538). References: - https://bugs.mageia.org/show_bug.cgi?id=29773 - https://matrix.org/blog/2021/12/13/disclosure-buffer-overflow-in-libolm-and-matrix-js-sdk - https://www.cve.org/CVERecord?id=CVE-2021-44538 SRPMS: - 8/core/olm-3.2.1-1.1.mga8 . The notification outlines a critical patch for olm components targeting a memory overflow security issue within Matrix libolm.. olm packages update, Buffer Overflow Fix, Mageia Security Advisory, Libolm Vulnerability. . Severity: Critical. LinuxSecurity.com Team

Dec 19, 2021 •Critical Mageia