Debian Security Advisory
DSA-3629-1 ntp -- security update
- Date Reported:
- 25 Jul 2016
- Affected Packages:
- ntp
- Vulnerable:
- Yes
- Security database references:
- In Mitre's CVE dictionary: CVE-2015-7974, CVE-2015-7977, CVE-2015-7978, CVE-2015-7979, CVE-2015-8138, CVE-2015-8158, CVE-2016-1547, CVE-2016-1548, CVE-2016-1550, CVE-2016-2516, CVE-2016-2518.
- More information:
-
Several vulnerabilities were discovered in the Network Time Protocol daemon and utility programs:
- CVE-2015-7974
Matt Street discovered that insufficient key validation allows impersonation attacks between authenticated peers.
- CVE-2015-7977
CVE-2015-7978
Stephen Gray discovered that a NULL pointer dereference and a buffer overflow in the handling of
ntpdc reslist
commands may result in denial of service. - CVE-2015-7979
Aanchal Malhotra discovered that if NTP is configured for broadcast mode, an attacker can send malformed authentication packets which break associations with the server for other broadcast clients.
- CVE-2015-8138
Matthew van Gundy and Jonathan Gardner discovered that missing validation of origin timestamps in ntpd clients may result in denial of service.
- CVE-2015-8158
Jonathan Gardner discovered that missing input sanitising in ntpq may result in denial of service.
- CVE-2016-1547
Stephen Gray and Matthew van Gundy discovered that incorrect handling of crypto NAK packets may result in denial of service.
- CVE-2016-1548
Jonathan Gardner and Miroslav Lichvar discovered that ntpd clients could be forced to change from basic client/server mode to interleaved symmetric mode, preventing time synchronisation.
- CVE-2016-1550
Matthew van Gundy, Stephen Gray and Loganaden Velvindron discovered that timing leaks in the packet authentication code could result in recovery of a message digest.
- CVE-2016-2516
Yihan Lian discovered that duplicate IPs on
unconfig
directives will trigger an assert. - CVE-2016-2518
Yihan Lian discovered that an OOB memory access could potentially crash ntpd.
For the stable distribution (jessie), these problems have been fixed in version 1:4.2.6.p5+dfsg-7+deb8u2.
For the testing distribution (stretch), these problems have been fixed in version 1:4.2.8p7+dfsg-1.
For the unstable distribution (sid), these problems have been fixed in version 1:4.2.8p7+dfsg-1.
We recommend that you upgrade your ntp packages.
- CVE-2015-7974