X11 library -xrm option buffer overflow
| x11-xrm-bo (8828) |  High Risk |
Description:
Some Caldera Unix distributions are vulnerable to a buffer overflow in any program that uses the X11 library and accepts the -xrm option to execute arbitrary code. By supplying a long string as an argument with an -xrm option, a local attacker can overflow a buffer and execute arbitrary code on the system.
Platforms Affected:
- SCO, Caldera OpenUnix 8.0.0
- SCO, Caldera UnixWare 7.1.1
Remedy:
For Caldera OpenUNIX 8.0.0 and UnixWare 7.1.1:
Upgrade to the latest basex package (basex.711b.pkg or later), as listed in Caldera International, Inc. Security Advisory CSSA-2002-SCO.15. See References.
Consequences:
Gain Privileges
References:
- BugTraq Mailing List, Tue Jan 08 2002 - 00:08:40 CST, xterm exploit in Unixware 7.0.1 at http://archives.neohapsis.com/archives/bugtraq/2002-01/0099.html.
- BugTraq Mailing List, Tue Jan 08 2002 - 00:12:56 CST, dtterm exploit in Unixware 7.1.1 at http://archives.neohapsis.com/archives/bugtraq/2002-01/0104.html.
- Caldera International, Inc. Security Advisory CSSA-2002-SCO.15, Open UNIX 8.0.0 UnixWare 7.1.1 : Buffer overflow in libX11 with -xrm at ftp://stage.caldera.com/pub/security/openunix/CSSA-2002-SCO.15/CSSA-2002-SCO.15.txt.
- BID-4502: Caldera X11 Library -xrm Buffer Overflow Vulnerability
- CVE-2002-0517: Buffer overflow in X11 library (libX11) on Caldera Open UNIX 8.0.0, UnixWare 7.1.1, and possibly other operating systems, allows local users to gain root privileges via a long -xrm argument to programs such as (1) dtterm or (2) xterm.
- US-CERT VU#169059: X11 vulnerable to buffer overflow in handling of -xrm option
Reported:
Apr 11, 2002
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