Linux kernel proc unauthorized access

linux-kernel-proc-unauth-access (40486)

Medium Risk

Description:

Linux kernel, when running vservers, could allow a local attacker to gain unauthorized access to the system, caused by the failure to properly check for symlinks in /proc. An attacker could exploit this vulnerability using a symlink attack to gain unauthorized access to the resources of other vservers.

*CVSS:

Base Score:	2.1
Access Vector:	Local
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	None
Availability Impact:	None
Temporal Score:	1.6
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

Remedy:

Apply the appropriate update for your system. See References.

References:

• DSA-1494-2: linux-2.6 -- missing access checks.
• The Linux Kernel Archives Web site: The Linux Kernel Archives.
• BID-27704: RETIRED: Linux Kernel Multiple Prior to 2.6.24.1 Multiple Memory Access Vulnerabilities
• BID-27798: Linux Kernel Prior to 2.6.24.1 '/proc' Local Memory Access Vulnerability
• CVE-2008-0163: Linux kernel 2.6, when using vservers, allows local users to access resources of other vservers via a symlink attack in /proc.
• DSA-1494: linux-2.6 -- missing access checks

Platforms Affected:

• Debian Debian Linux 4.0
• Linux Kernel 2.6.0

Reported:

Feb 11, 2008

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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 IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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