GLSA-200905-08 : NTP: Remote execution of arbitrary code
Medium Nessus Plugin ID 38920
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200905-08 (NTP: Remote execution of arbitrary code)
Multiple vulnerabilities have been found in the programs included in the NTP package:
Apple Product Security reported a boundary error in the cookedprint() function in ntpq/ntpq.c, possibly leading to a stack-based buffer overflow (CVE-2009-0159).
Chris Ries of CMU reported a boundary error within the crypto_recv() function in ntpd/ntp_crypto.c, possibly leading to a stack-based buffer overflow (CVE-2009-1252).
A remote attacker might send a specially crafted package to a machine running ntpd, possibly resulting in the remote execution of arbitrary code with the privileges of the user running the daemon, or a Denial of Service. NOTE: Successful exploitation requires the 'autokey' feature to be enabled. This feature is only available if NTP was built with the 'ssl' USE flag.
Furthermore, a remote attacker could entice a user into connecting to a malicious server using ntpq, possibly resulting in the remote execution of arbitrary code with the privileges of the user running the application, or a Denial of Service.
You can protect against CVE-2009-1252 by disabling the 'ssl' USE flag and recompiling NTP.
SolutionAll NTP users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/ntp-4.2.4_p7'