1. Ubuntu Security Notices
  2. USN-310-1

USN-310-1: ppp vulnerability

Publication date

6 July 2006

Overview

ppp vulnerability

Releases

Details

Marcus Meissner discovered that the winbind plugin of pppd does not
check the result of the setuid() call. On systems that configure PAM
limits for the maximum number of user processes and enable the winbind
plugin, a local attacker could exploit this to execute the winbind
NTLM authentication helper as root. Depending on the local winbind
configuration, this could potentially lead to privilege escalation.

Marcus Meissner discovered that the winbind plugin of pppd does not
check the result of the setuid() call. On systems that configure PAM
limits for the maximum number of user processes and enable the winbind
plugin, a local attacker could exploit this to execute the winbind
NTLM authentication helper as root. Depending on the local winbind
configuration, this could potentially lead to privilege escalation.

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
6.06 dapper ppp –  2.4.4b1-1ubuntu3.1
ppp-udeb –  2.4.4b1-1ubuntu3.1
ppp-dev –  2.4.4b1-1ubuntu3.1
5.10 breezy ppp –  2.4.3-20050321+2ubuntu1.1
ppp-udeb –  2.4.3-20050321+2ubuntu1.1
ppp-dev –  2.4.3-20050321+2ubuntu1.1

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References

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