XFree86 MIT-SHM allows shared memory access
| xfree86-mitshm-memory-access (8706) |  Medium Risk |
Description:
The MIT-SHM extension for XFree86 in some Linux distributions could allow a local attacker to gain read/write access to any shared memory segment on the system.
Consequences:
Gain Access
Remedy:
For Caldera OpenLinux 3.1 and 3.1.1:
Upgrade to the latest XFree86 packages (4.1-12 or later) as listed in Caldera International, Inc. Security Advisory CSSA-2002-009.0. See References.
For Caldera OpenLinux UNIX 8.0.0 :
Upgrade to the latest xserver packages (800a or later) as listed in Caldera International, Inc. Security Advisory CSSA-2002-SCO.14. See References.
For Caldera UnixWare: 7.1.1:
Upgrade to the latest xserver packages (711b or later) as listed in Caldera International, Inc. Security Advisory CSSA-2002-SCO.14.. See References.
For Conectiva Linux 6.0 and 7.0:
Upgrade to the latest XFree86 package, when it becomes available from the Conectiva Linux Security Announcement CLSA-2002:529. See References.
For Conectiva Linux 8.0:
Upgrade to the latest XFree86 package (4.2.0-21U80_2cl or later), when it becomes available from the Conectiva Linux Security Announcement CLSA-2002:529. See References.
For Gentoo Linux:
Upgrade versions x11-base/xfree-4.2.0-r12 and earlier, as listed in Gentoo Linux Security Announcement 2002-10-24 10:00 UTC. See References.
For Red Hat Linux 8.0:
Upgrade to the latest XFree86 package (4.2.1-21 or later), as listed in RHSA-2003:067-19. See References.
For Sun Linux 5.0:
Apply the appropriate patch for your system. Refer to Sun Alert ID: 55602 for more information. See References.
For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest xfree86 package (4.1.0-16woody1 or later), as listed in DSA-380-1. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- Caldera International, Inc. Security Advisory CSSA-2002-009.0: Linux: X server allows access to any shared memory on the system.
- Caldera International, Inc. Security Advisory CSSA-2002-SCO.14: Open UNIX 8.0.0 UnixWare 7.1.1 : X server allows access to any shared memory on the system.
- CIAC Information Bulletin N-110: Red Hat Updated XFree86 Packages Provide Security and Bug Fixes.
- Conectiva Linux Announcement CLSA-2002:529: XFree86.
- Gentoo Linux Security Announcement 2002-10-24 10:00 UTC: Shared memory may be compromised by local XFree86 users.
- Sun Alert ID: 55602: Sun Linux 5.0 Security Vulnerabilities in XFree86 Packages.
- BID-4396: XFree86 MIT-SHM Shared Memory Access Vulnerability
- CVE-2002-0164: Vulnerability in the MIT-SHM extension of the X server on Linux (XFree86) 4.2.1 and earlier allows local users to read and write arbitrary shared memory, possibly to cause a denial of service or gain privileges.
- DSA-380: xfree86 -- buffer overflows
- RHSA-2003-064: Updated XFree86 4.1.0 packages are available
- RHSA-2003-065: XFree86 security update
- RHSA-2003-066: Updated XFree86 packages provide security and bug fixes
- RHSA-2003-067: Updated XFree86 packages provide security and bug fixes
Platforms Affected:
- Conectiva Linux 6.0
- Conectiva Linux 7.0
- Conectiva Linux 8.0
- Debian Debian Linux 3.0
- Gentoo Linux
- RedHat Enterprise Linux 2.1 ES
- RedHat Enterprise Linux 2.1 WS
- RedHat Enterprise Linux 2.1 AS
- RedHat Linux 7
- RedHat Linux 7.1
- RedHat Linux 7.2
- RedHat Linux 7.3
- RedHat Linux 8.0
- RedHat Linux Advanced Workstation 2.1 Itanium
- SCO Caldera OpenLinux Server 3.1
- SCO Caldera OpenLinux Server 3.1.1
- SCO Caldera OpenLinux Workstation 3.1
- SCO Caldera OpenLinux Workstation 3.1.1
- SCO Caldera OpenUnix 8.0.0
- SCO Caldera UnixWare 7.1.1
- Sun Linux 5.0
- XFree86 XFree86 4.2.0 and prior
Reported:
Mar 15, 2002
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