1. Ubuntu Security Notices
  2. USN-777-1

USN-777-1: Ntp vulnerabilities

Publication date

19 May 2009

Overview

Ntp vulnerabilities

Releases

Packages

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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
9.04 jaunty ntp –  1:4.2.4p4+dfsg-7ubuntu5.1
8.10 intrepid ntp –  1:4.2.4p4+dfsg-6ubuntu2.3
8.04 hardy ntp –  1:4.2.4p4+dfsg-3ubuntu2.2
6.06 dapper ntp-server –  1:4.2.0a+stable-8.1ubuntu6.2
ntp –  1:4.2.0a+stable-8.1ubuntu6.2

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References

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