[SECURITY] [DLA 559-1] ntp security update

[news 28]

Package : ntp

Version : 1:4.2.6.p5+dfsg-2+deb7u7

CVE ID : 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

 

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 my 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 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 Debian 7 "Wheezy", these problems have been fixed in version

1:4.2.6.p5+dfsg-2+deb7u7.

 

We recommend that you upgrade your ntp packages.

 

Further information about Debian LTS security advisories, how to apply

these updates to your system and frequently asked questions can be

found at: https://wiki.debian.org/LTS