CVE-2012-4502: Tuxfamily Chrony

Medium severity, CVSS 5.0. EPSS: 3.2% chance of exploitation in the next 30 days.

Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote attackers to cause a denial of service (crash) via a crafted (1) REQ_SUBNETS_ACCESSED or (2) REQ_CLIENT_ACCESSES command request to the PKL_CommandLength function or crafted (3) RPY_SUBNETS_ACCESSED, (4) RPY_CLIENT_ACCESSES, (5) RPY_CLIENT_ACCESSES_BY_INDEX, or (6) RPY_MANUAL_LIST command reply to the PKL_ReplyLength function, which triggers an out-of-bounds read or buffer overflow. NOTE: versions 1.27 and 1.28 do not require authentication to exploit.

Affected products

• Tuxfamily Chrony: up to and including 1.28; version 1.0 only; version 1.1 only; version 1.18 only; version 1.19 only; version 1.19.99.1 only; …

Published 2013-11-05. Last modified 2026-06-16.