USN-777-1: Ntp vulnerabilities

Releases

• Ubuntu 9.04
• Ubuntu 8.10
• Ubuntu 8.04
• Ubuntu 6.06

Packages

• ntp -

Details

A stack-based buffer overflow was discovered in ntpq. If a user were
tricked into connecting to a malicious ntp server, a remote attacker could
cause a denial of service in ntpq, or possibly execute arbitrary code with
the privileges of the user invoking the program. (CVE-2009-0159)

Chris Ries discovered a stack-based overflow in ntp. If ntp was configured
to use autokey, a remote attacker could send a crafted packet to cause a
denial of service, or possibly execute arbitrary code. (CVE-2009-1252)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.04

• ntp - 1:4.2.4p4+dfsg-7ubuntu5.1

Ubuntu 8.10

• ntp - 1:4.2.4p4+dfsg-6ubuntu2.3

Ubuntu 8.04

• ntp - 1:4.2.4p4+dfsg-3ubuntu2.2

Ubuntu 6.06

• ntp-server - 1:4.2.0a+stable-8.1ubuntu6.2
• ntp - 1:4.2.0a+stable-8.1ubuntu6.2

In general, a standard system upgrade is sufficient to effect the
necessary changes.

References

• CVE-2009-0159
• CVE-2009-1252