ELA-224-2 ntp security update

Denial of service vulnerability update

2020-04-30
Packagentp
Version1:4.2.6.p5+dfsg-2+deb7u9
Related CVEs CVE-2020-11868

A Denial of Service (DoS) vulnerability was discovered in the network time protocol server/client, ntp.

ntp allowed an “off-path” attacker to block unauthenticated synchronisation via a server mode packet with a spoofed source IP address because transmissions were rescheduled even if a packet lacked a valid “origin timestamp”.

Whilst this was initially addressed in version 1:4.2.6.p5+dfsg-2+deb7u8, lhis update adds further protection that was not present before.

For Debian 7 Wheezy, these problems have been fixed in version 1:4.2.6.p5+dfsg-2+deb7u9.

We recommend that you upgrade your ntp packages.

Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/