XFree86 -xkbmap parameter buffer overflow
| xfree86-xkbmap-parameter-bo (4867) |  High Risk |
Description:
XFree86 is vulnerable to a buffer overflow in the X server. By sending a long -xkbmap parameter containing 2100 characters or more to the X server, a local attacker can overflow the buffer and execute arbitrary code on the system with root privileges.
Consequences:
Gain Privileges
Remedy:
Upgrade to the latest version of XFree86 (4.0.1 or later), available from the XFree86 Web site. See References.
For Red Hat Linux 6.2:
Upgrade to the latest version of Xfree86 (3.3.6-29 or later), as listed in RHSA-2001:071-05. See References.
For Red Hat Linux 7.0 and 7.1:
Upgrade to the latest version of Xfree86 (3.3.6-38 or later), as listed in RHSA-2001:071-05. See References.
For FreeBSD ports collection prior to 2000-06-09:
Upgrade to the latest ports package dated 2000-06-09 or later or upgrade to the latest version of Xfree86 (4.0.1 or later), as listed in FreeBSD, Inc. Security Advisory FreeBSD-SA-00:27. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- BugTraq Mailing List, Sun Apr 16 2000 - 11:54:41 CDT: XFree86 server overflow.
- FreeBSD Security Advisory FreeBSD-SA-00:27: XFree86-4.0 port contains local root overflow.
- The XFree86 Project, Inc. Web site: XFree86 4.0.1.
- BID-1306: XFree86 Xserver Buffer Overflow Vulnerability
- CVE-2000-0285: Buffer overflow in XFree86 3.3.x allows local users to execute arbitrary commands via a long -xkbmap parameter.
- RHSA-2001-071: New updated XFree86 packages available
Platforms Affected:
- FreeBSD FreeBSD
- FreeBSD FreeBSD Ports Collection
- RedHat Linux 6.2
- RedHat Linux 7
- RedHat Linux 7.1
- RedHat Linux 7.2
- RedHat Linux 7.3
- XFree86 XFree86 3.3.x
Reported:
Apr 16, 2000
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For corrections or additions please email xforce@iss.net