Linux Security LSM Module allows elevated privileges
| linux-security-module-gain-privileges (18673) |  High Risk |
Description:
Linux Security Modules (LSM) could allow a local attacker to gain elevated privileges, caused by a vulnerability when loading the Capability LSM Module as a loadable kernel module. A local attacker could exploit this vulnerability to gain elevated privileges on the system, typically root.
Consequences:
Gain Privileges
Remedy:
For Ubuntu Linux:
Upgrade to the latest linux-image package (2.6.8.1-16.8 or later), as listed in USN-57-1 January 09, 2005 for more information. See References.
As a workaround, ensure that the Capability LSM module is only used when compiled into the kernel.
References:
- BugTraq Mailing List, Thu Dec 23 2004 - 08:57:01 CST: Linux 2.6 Kernel Capability LSM Module Local Privilege Elevation.
- Linux Security Modules Web page: Linux Security Modules.
- BID-12093: Linux Security Modules Process Capabilities Design Error Vulnerability
- CVE-2004-1337: The POSIX Capability Linux Security Module (LSM) for Linux kernel 2.6 does not properly handle the credentials of a process that is launched before the module is loaded, which allows local users to gain privileges.
- MDKSA-2005:110: Updated 2.6 kernel packages fix multiple vulnerabilities
- USN-57-1: Linux kernel vulnerabilities
Platforms Affected:
- Canonical Ubuntu 4.10
- LSM Linux Security Module 2.5.71-lsm1
- MandrakeSoft Mandrake Linux 10.0 AMD64
- MandrakeSoft Mandrake Linux 10.0
- MandrakeSoft Mandrake Linux 10.1 X86_64
- MandrakeSoft Mandrake Linux 10.1
- MandrakeSoft Mandrake Linux LE2005
- MandrakeSoft Mandrake Linux LE2005 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 3.0
- MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft Mandrake Multi Network Firewall 2.0
Reported:
Dec 27, 2004
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