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Mageia 6: 2018-0435 Critical: GnuTLS HMAC-SHA Timing Attack Mitigation

The updated packages fix security vulnerabilities: It was found that the GnuTLS implementation of HMAC-SHA-256 and HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and . MGASA-2018-0435 - Updated gnutls packages fix security vulnerabilities Publication date: 03 Nov 2018 URL: https://advisories.mageia.org/MGASA-2018-0435.html Type: security Affected Mageia releases: 6 CVE: CVE-2018-10844, CVE-2018-10845, CVE-2018-10846 The updated packages fix security vulnerabilities: It was found that the GnuTLS implementation of HMAC-SHA-256 and HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data using crafted packets (CVE-2018-10844, CVE-2018-10845). A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets (CVE-2018-10846). References: - https://bugs.mageia.org/show_bug.cgi?id=23682 - - - https://www.cve.org/CVERecord?id=CVE-2018-10844 - https://www.cve.org/CVERecord?id=CVE-2018-10845 - https://www.cve.org/CVERecord?id=CVE-2018-10846 SRPMS: - 6/core/gnutls-3.5.13-1.1.mga6 . Mageia users can now benefit from updated gnutls packages that address significant vulnerabilities, including potential timing attack threats.. GnuTLS Update,Mageia Security,Remote Attack Prevention. . LinuxSecurity.com Team

Nov 03, 2018 Mageia