MGASA-2015-0163

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MGASA-2015-0163

Summary: Updated chrony packages fix security vulnerabilities

Details: Updated chrony package fixes security vulnerabilities: Using particular address/subnet pairs when configuring access control would cause an invalid memory write. This could allow attackers to cause a denial of service (crash) or execute arbitrary code (CVE-2015-1821). When allocating memory to save unacknowledged replies to authenticated command requests, a pointer would be left uninitialized, which could trigger an invalid memory write. This could allow attackers to cause a denial of service (crash) or execute arbitrary code (CVE-2015-1822). When peering with other NTP hosts using authenticated symmetric association, the internal state variables would be updated before the MAC of the NTP messages was validated. This could allow a remote attacker to cause a denial of service by impeding synchronization between NTP peers (CVE-2015-1853).

References: https://advisories.mageia.org/MGASA-2015-0163.html, https://bugs.mageia.org/show_bug.cgi?id=15647, http://chrony.tuxfamily.org/News.html, https://www.debian.org/security/2015/dsa-3222