Synopsis: Moderate: ntp security and bug fix update
Advisory ID: SLSA-2016:0780-1
Issue Date: 2016-05-10
CVE Numbers: CVE-2015-5194
CVE-2015-5195
CVE-2015-7703
CVE-2015-5219
CVE-2015-7691
CVE-2015-7692
CVE-2015-7702
CVE-2015-7701
CVE-2015-7852
CVE-2015-7977
CVE-2015-7978
—
Security Fix(es):
* It was found that the fix for CVE-2014-9750 was incomplete: three issues
were found in the value length checks in NTP’s ntp_crypto.c, where a
packet with particular autokey operations that contained malicious data
was not always being completely validated. A remote attacker could use a
specially crafted NTP packet to crash ntpd. (CVE-2015-7691, CVE-2015-7692,
CVE-2015-7702)
* A memory leak flaw was found in ntpd’s CRYPTO_ASSOC. If ntpd was
configured to use autokey authentication, an attacker could send packets
to ntpd that would, after several days of ongoing attack, cause it to run
out of memory. (CVE-2015-7701)
* An off-by-one flaw, leading to a buffer overflow, was found in
cookedprint functionality of ntpq. A specially crafted NTP packet could
potentially cause ntpq to crash. (CVE-2015-7852)
* A NULL pointer dereference flaw was found in the way ntpd processed
‘ntpdc reslist’ commands that queried restriction lists with a large
amount of entries. A remote attacker could potentially use this flaw to
crash ntpd. (CVE-2015-7977)
* A stack-based buffer overflow flaw was found in the way ntpd processed
‘ntpdc reslist’ commands that queried restriction lists with a large
amount of entries. A remote attacker could use this flaw to crash ntpd.
(CVE-2015-7978)
* It was found that ntpd could crash due to an uninitialized variable when
processing malformed logconfig configuration commands. (CVE-2015-5194)
* It was found that ntpd would exit with a segmentation fault when a
statistics type that was not enabled during compilation (e.g. timingstats)
was referenced by the statistics or filegen configuration command.
(CVE-2015-5195)
* It was discovered that the sntp utility could become unresponsive due to
being caught in an infinite loop when processing a crafted NTP packet.
(CVE-2015-5219)
* It was found that NTP’s :config command could be used to set the pidfile
and driftfile paths without any restrictions. A remote attacker could use
this flaw to overwrite a file on the file system with a file containing
the pid of the ntpd process (immediately) or the current estimated drift
of the system clock (in hourly intervals). (CVE-2015-7703)
The CVE-2015-5219 and CVE-2015-7703 issues were discovered by Miroslav
Lichvr (Red Hat).
—
SL6
x86_64
ntp-4.2.6p5-10.el6.x86_64.rpm
ntp-debuginfo-4.2.6p5-10.el6.x86_64.rpm
ntpdate-4.2.6p5-10.el6.x86_64.rpm
ntp-perl-4.2.6p5-10.el6.x86_64.rpm
i386
ntp-4.2.6p5-10.el6.i686.rpm
ntp-debuginfo-4.2.6p5-10.el6.i686.rpm
ntpdate-4.2.6p5-10.el6.i686.rpm
ntp-perl-4.2.6p5-10.el6.i686.rpm
noarch
ntp-doc-4.2.6p5-10.el6.noarch.rpm
– Scientific Linux Development Team
