user-ppp command_Expand_Interpret() buffer overflow

userppp-commandexpandinterpret-bo (41034) The risk level is classified as HighHigh Risk

Description:

The user-ppp command, as used in FreeBSD, OpenBSD, and NetBSD, is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the command_Expand_Interpret() function. By sending a specially-crafted string via the user-ppp command, a local attacker with network group privileges granted could overflow a buffer and execute arbitrary code on the system with root privileges or cause the application to crash.

Platforms Affected:

  • FreeBSD, FreeBSD 6.3
  • NetBSD, NetBSD
  • OpenBSD, OpenBSD

Remedy:

For OpenBSD:
Apply the patch for this vulnerability, available from the OpenBSD CVS repository. See References.

For other distributions:
Apply the appropriate update for your system. See References.

Consequences:

Gain Privileges

References:

Reported:

Feb 29, 2008

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

Copyright (c) 1994-2008 Internet Security Systems, Inc. All rights reserved worldwide.

For corrections or additions please email xforce@iss.net

Return to the main page