National Cyber Awareness System

Vulnerability Summary for CVE-2011-0726

Overview

The do_task_stat function in fs/proc/array.c in the Linux kernel before 2.6.39-rc1 does not perform an expected uid check, which makes it easier for local users to defeat the ASLR protection mechanism by reading the start_code and end_code fields in the /proc/#####/stat file for a process executing a PIE binary.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: MLIST

Name: [linux-kernel] 20110311 [PATCH] proc: protect mm start_code/end_code in /proc/pid/stat

Type: Patch Information

Hyperlink:https://lkml.org/lkml/2011/3/11/380

External Source: MLIST

Name: [mm-commits] 20110314 + proc-protect-mm-start_code-end_code-in-proc-pid-stat.patch added to -mm tree

Type: Patch Information

Hyperlink:http://www.spinics.net/lists/mm-commits/msg82726.html

External Source: BID

Name: 47791

Type: Patch Information

Hyperlink:http://www.securityfocus.com/bid/47791

External Source: CONFIRM

Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5883f57ca0008ffc93e09cbb9847a1928e50c6f3

Type: Patch Information

Hyperlink:http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5883f57ca0008ffc93e09cbb9847a1928e50c6f3

External Source: CONFIRM

Name: https://bugzilla.redhat.com/show_bug.cgi?id=684569

Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=684569

External Source: CONFIRM

Name: http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.39/ChangeLog-2.6.39-rc1

Hyperlink:http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.39/ChangeLog-2.6.39-rc1