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National Cyber Awareness System

Vulnerability Summary for CVE-2007-4571

Original release date: 09/26/2007
Last revised: 03/07/2011
Source: US-CERT/NIST

Overview

The snd_mem_proc_read function in sound/core/memalloc.c in the Advanced Linux Sound Architecture (ALSA) in the Linux kernel before 2.6.22.8 does not return the correct write size, which allows local users to obtain sensitive information (kernel memory contents) via a small count argument, as demonstrated by multiple reads of /proc/driver/snd-page-alloc.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 2.1 (LOW) (AV:L/AC:L/AU:N/C:P/I:N/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information

Vendor Statements (disclaimer)

Official Statement from Red Hat (10/18/2007)
This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 2.1 or 3.

References to Advisories, Solutions, and Tools

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External Source: CONFIRM
Name: http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.8
External Source: VUPEN
Name: ADV-2007-3272
External Source: CONFIRM
Name: http://support.avaya.com/elmodocs2/security/ASA-2007-474.htm
External Source: SECUNIA
Name: 26989
External Source: BID
Name: 25807
External Source: SECUNIA
Name: 26918
External Source: OVAL
Name: oval:org.mitre.oval:def:9053
External Source: SECUNIA
Name: 27824
External Source: IDEFENSE
Name: 20070925 Linux Kernel ALSA snd_mem_proc_read Information Disclosure Vulnerability
External Source: UBUNTU
Name: USN-618-1
External Source: SECUNIA
Name: 29054
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ccec6e2c4a74adf76ed4e2478091a311b1806212
External Source: DEBIAN
Name: DSA-1479
External Source: SECUNIA
Name: 27436
External Source: SECUNIA
Name: 26980
External Source: SUSE
Name: SUSE-SA:2007:053
External Source: SECUNIA
Name: 27227
External Source: SECUNIA
Name: 27747
External Source: CONFIRM
Name: https://issues.rpath.com/browse/RPL-1761
External Source: REDHAT
Name: RHSA-2007:0939
External Source: FEDORA
Name: FEDORA-2007-2349
External Source: FEDORA
Name: FEDORA-2007-714
External Source: SECUNIA
Name: 30769
External Source: SECUNIA
Name: 27101
External Source: REDHAT
Name: RHSA-2007:0993
External Source: SECTRACK
Name: 1018734
External Source: SECUNIA
Name: 28626
External Source: XF
Name: linux-sndpagealloc-information-disclosure(36780)
External Source: DEBIAN
Name: DSA-1505

References to Check Content

Identifier: oval:org.mitre.oval:def:9053
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

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