ISS X-Force Database: linux-sndpagealloc-information-disclosure(36780): Linux kernel /proc/driver/snd-page-alloc information disclosure

Linux kernel /proc/driver/snd-page-alloc information disclosure

linux-sndpagealloc-information-disclosure (36780)

Medium Risk

Description:

Linux could allow a local attacker to obtain sensitive information, caused by a vulnerability in the Advanced Linux Sound Architecture (ALSA) driver's snd_mem_proc_read function when handling multiple /proc/driver/snd-page-alloc file reads. If an audio device is connected to the system, an attacker could exploit this vulnerability to read system memory and obtain sensitive information.

Platforms Affected:

Avaya, Application Enablement Services 4.0.1
Avaya, Communication Manager 3.0
Avaya, Communication Manager 3.0.1
Avaya, Communication Manager 3.1
Avaya, Communication Manager 3.1.1
Avaya, Communication Manager 3.1.2
Avaya, Communication Manager 3.1.3
Avaya, Communication Manager 3.1.4
Avaya, Communication Manager 4.0
Avaya, Communication Manager 4.0.1
Avaya, Communication Manager 4.0.3
Avaya, Converged Communications Server 3.1.1
Avaya, Converged Communications Server 3.1.2
Avaya, Converged Communications Server 4.0
Avaya, Intuity Audix LX 2.0
Avaya, Message Networking 3.1
Avaya, Message Storage Server 3.0
Avaya, SIP Enablement Services 3.1.1
Avaya, SIP Enablement Services 3.1.2
Avaya, SIP Enablement Services 4.0
Canonical, Ubuntu 6.06 LTS
Canonical, Ubuntu 7.04
Canonical, Ubuntu 7.10
Debian, Debian Linux 3.1
Debian, Debian Linux 4.0
FedoraProject, Fedora Core 7
Linux, Kernel 2.6.0 test7
Linux, Kernel 2.6.0 test6
Linux, Kernel 2.6.0 test1
Linux, Kernel 2.6.0 test10
Linux, Kernel 2.6.0 test11
Linux, Kernel 2.6.0 test8
Linux, Kernel 2.6.0 test3
Linux, Kernel 2.6.0 test4
Linux, Kernel 2.6.0 test5
Linux, Kernel 2.6.0
Linux, Kernel 2.6.0 test9
Linux, Kernel 2.6.0 test2
Linux, Kernel 2.6.1 rc1
Linux, Kernel 2.6.1 rc2
Linux, Kernel 2.6.1 rc3
Linux, Kernel 2.6.1
Linux, Kernel 2.6.10 rc3
Linux, Kernel 2.6.10
Linux, Kernel 2.6.10 rc2
Linux, Kernel 2.6.10 rc1
Linux, Kernel 2.6.11 rc5
Linux, Kernel 2.6.11
Linux, Kernel 2.6.11 rc1
Linux, Kernel 2.6.11 rc2
Linux, Kernel 2.6.11 rc3
Linux, Kernel 2.6.11 rc4
Linux, Kernel 2.6.11.1
Linux, Kernel 2.6.11.10
Linux, Kernel 2.6.11.11
Linux, Kernel 2.6.11.12
Linux, Kernel 2.6.11.2
Linux, Kernel 2.6.11.3
Linux, Kernel 2.6.11.4
Linux, Kernel 2.6.11.5
Linux, Kernel 2.6.11.6
Linux, Kernel 2.6.11.7
Linux, Kernel 2.6.11.8
Linux, Kernel 2.6.11.9
Linux, Kernel 2.6.12 rc6
Linux, Kernel 2.6.12 rc4
Linux, Kernel 2.6.12
Linux, Kernel 2.6.12 rc3
Linux, Kernel 2.6.12 rc2
Linux, Kernel 2.6.12 rc1
Linux, Kernel 2.6.12 rc5
Linux, Kernel 2.6.12.1
Linux, Kernel 2.6.12.12
Linux, Kernel 2.6.12.2
Linux, Kernel 2.6.12.22
Linux, Kernel 2.6.12.3
Linux, Kernel 2.6.12.4
Linux, Kernel 2.6.12.5
Linux, Kernel 2.6.12.6
Linux, Kernel 2.6.13 rc7
Linux, Kernel 2.6.13 rc6
Linux, Kernel 2.6.13 rc5
Linux, Kernel 2.6.13 rc4
Linux, Kernel 2.6.13 rc3
Linux, Kernel 2.6.13 rc2
Linux, Kernel 2.6.13 rc1
Linux, Kernel 2.6.13
Linux, Kernel 2.6.13.1
Linux, Kernel 2.6.13.2
Linux, Kernel 2.6.13.3
Linux, Kernel 2.6.13.4
Linux, Kernel 2.6.13.5
Linux, Kernel 2.6.14 rc2
Linux, Kernel 2.6.14 rc5
Linux, Kernel 2.6.14 rc4
Linux, Kernel 2.6.14 rc3
Linux, Kernel 2.6.14 rc1
Linux, Kernel 2.6.14
Linux, Kernel 2.6.14.1
Linux, Kernel 2.6.14.2
Linux, Kernel 2.6.14.3
Linux, Kernel 2.6.14.4
Linux, Kernel 2.6.14.5
Linux, Kernel 2.6.14.6
Linux, Kernel 2.6.14.7
Linux, Kernel 2.6.15 rc7
Linux, Kernel 2.6.15 rc6
Linux, Kernel 2.6.15 rc5
Linux, Kernel 2.6.15 rc4
Linux, Kernel 2.6.15 rc3
Linux, Kernel 2.6.15 rc1
Linux, Kernel 2.6.15 rc2
Linux, Kernel 2.6.15
Linux, Kernel 2.6.15.1
Linux, Kernel 2.6.15.11
Linux, Kernel 2.6.15.2
Linux, Kernel 2.6.15.3
Linux, Kernel 2.6.15.4
Linux, Kernel 2.6.15.5
Linux, Kernel 2.6.15.6
Linux, Kernel 2.6.15.7
Linux, Kernel 2.6.16
Linux, Kernel 2.6.16 rc7
Linux, Kernel 2.6.16 rc6
Linux, Kernel 2.6.16 rc5
Linux, Kernel 2.6.16 rc4
Linux, Kernel 2.6.16 rc3
Linux, Kernel 2.6.16.1
Linux, Kernel 2.6.16.10
Linux, Kernel 2.6.16.11
Linux, Kernel 2.6.16.12
Linux, Kernel 2.6.16.13
Linux, Kernel 2.6.16.14
Linux, Kernel 2.6.16.15
Linux, Kernel 2.6.16.16
Linux, Kernel 2.6.16.17
Linux, Kernel 2.6.16.18
Linux, Kernel 2.6.16.19
Linux, Kernel 2.6.16.2
Linux, Kernel 2.6.16.20
Linux, Kernel 2.6.16.21
Linux, Kernel 2.6.16.22
Linux, Kernel 2.6.16.23
Linux, Kernel 2.6.16.24
Linux, Kernel 2.6.16.25
Linux, Kernel 2.6.16.26
Linux, Kernel 2.6.16.27
Linux, Kernel 2.6.16.28
Linux, Kernel 2.6.16.29
Linux, Kernel 2.6.16.3
Linux, Kernel 2.6.16.30
Linux, Kernel 2.6.16.31
Linux, Kernel 2.6.16.32
Linux, Kernel 2.6.16.33
Linux, Kernel 2.6.16.34
Linux, Kernel 2.6.16.35
Linux, Kernel 2.6.16.36
Linux, Kernel 2.6.16.37
Linux, Kernel 2.6.16.38
Linux, Kernel 2.6.16.39
Linux, Kernel 2.6.16.4
Linux, Kernel 2.6.16.40
Linux, Kernel 2.6.16.41
Linux, Kernel 2.6.16.43
Linux, Kernel 2.6.16.44
Linux, Kernel 2.6.16.45
Linux, Kernel 2.6.16.46
Linux, Kernel 2.6.16.47
Linux, Kernel 2.6.16.48
Linux, Kernel 2.6.16.49
Linux, Kernel 2.6.16.5
Linux, Kernel 2.6.16.50
Linux, Kernel 2.6.16.51
Linux, Kernel 2.6.16.52
Linux, Kernel 2.6.16.53
Linux, Kernel 2.6.16.6
Linux, Kernel 2.6.16.7
Linux, Kernel 2.6.16.8
Linux, Kernel 2.6.16.9
Linux, Kernel 2.6.17 rc1
Linux, Kernel 2.6.17
Linux, Kernel 2.6.17 rc6
Linux, Kernel 2.6.17 rc5
Linux, Kernel 2.6.17 rc4
Linux, Kernel 2.6.17 rc3
Linux, Kernel 2.6.17 rc2
Linux, Kernel 2.6.17.1
Linux, Kernel 2.6.17.10
Linux, Kernel 2.6.17.11
Linux, Kernel 2.6.17.12
Linux, Kernel 2.6.17.13
Linux, Kernel 2.6.17.14
Linux, Kernel 2.6.17.2
Linux, Kernel 2.6.17.3
Linux, Kernel 2.6.17.4
Linux, Kernel 2.6.17.5
Linux, Kernel 2.6.17.6
Linux, Kernel 2.6.17.7
Linux, Kernel 2.6.17.8
Linux, Kernel 2.6.17.9
Linux, Kernel 2.6.18
Linux, Kernel 2.6.18 rc5
Linux, Kernel 2.6.18 rc2
Linux, Kernel 2.6.18 rc1
Linux, Kernel 2.6.18 rc3
Linux, Kernel 2.6.18 rc4
Linux, Kernel 2.6.18 rc6
Linux, Kernel 2.6.18 rc7
Linux, Kernel 2.6.18.1
Linux, Kernel 2.6.18.10
Linux, Kernel 2.6.18.11
Linux, Kernel 2.6.18.12
Linux, Kernel 2.6.18.13
Linux, Kernel 2.6.18.14
Linux, Kernel 2.6.18.15
Linux, Kernel 2.6.18.16
Linux, Kernel 2.6.18.17
Linux, Kernel 2.6.18.18
Linux, Kernel 2.6.18.19
Linux, Kernel 2.6.18.2
Linux, Kernel 2.6.18.20
Linux, Kernel 2.6.18.21
Linux, Kernel 2.6.18.22
Linux, Kernel 2.6.18.23
Linux, Kernel 2.6.18.24
Linux, Kernel 2.6.18.25
Linux, Kernel 2.6.18.26
Linux, Kernel 2.6.18.27
Linux, Kernel 2.6.18.28
Linux, Kernel 2.6.18.29
Linux, Kernel 2.6.18.3
Linux, Kernel 2.6.18.30
Linux, Kernel 2.6.18.31
Linux, Kernel 2.6.18.32
Linux, Kernel 2.6.18.33
Linux, Kernel 2.6.18.34
Linux, Kernel 2.6.18.35
Linux, Kernel 2.6.18.36
Linux, Kernel 2.6.18.37
Linux, Kernel 2.6.18.38
Linux, Kernel 2.6.18.39
Linux, Kernel 2.6.18.4
Linux, Kernel 2.6.18.40
Linux, Kernel 2.6.18.41
Linux, Kernel 2.6.18.42
Linux, Kernel 2.6.18.43
Linux, Kernel 2.6.18.44
Linux, Kernel 2.6.18.45
Linux, Kernel 2.6.18.46
Linux, Kernel 2.6.18.47
Linux, Kernel 2.6.18.48
Linux, Kernel 2.6.18.49
Linux, Kernel 2.6.18.5
Linux, Kernel 2.6.18.50
Linux, Kernel 2.6.18.51
Linux, Kernel 2.6.18.52
Linux, Kernel 2.6.18.53
Linux, Kernel 2.6.18.6
Linux, Kernel 2.6.18.7
Linux, Kernel 2.6.18.8
Linux, Kernel 2.6.18.9
Linux, Kernel 2.6.19 rc4
Linux, Kernel 2.6.19 rc1
Linux, Kernel 2.6.19 rc2
Linux, Kernel 2.6.19 rc3
Linux, Kernel 2.6.19.0
Linux, Kernel 2.6.19.1
Linux, Kernel 2.6.19.2
Linux, Kernel 2.6.19.3
Linux, Kernel 2.6.19.4
Linux, Kernel 2.6.2
Linux, Kernel 2.6.2 rc3
Linux, Kernel 2.6.2 rc2
Linux, Kernel 2.6.2 rc1
Linux, Kernel 2.6.20 rc2
Linux, Kernel 2.6.20
Linux, Kernel 2.6.20.1
Linux, Kernel 2.6.20.10
Linux, Kernel 2.6.20.11
Linux, Kernel 2.6.20.12
Linux, Kernel 2.6.20.13
Linux, Kernel 2.6.20.14
Linux, Kernel 2.6.20.15
Linux, Kernel 2.6.20.2
Linux, Kernel 2.6.20.3
Linux, Kernel 2.6.20.4
Linux, Kernel 2.6.20.5
Linux, Kernel 2.6.20.6
Linux, Kernel 2.6.20.7
Linux, Kernel 2.6.20.8
Linux, Kernel 2.6.20.9
Linux, Kernel 2.6.21 git7
Linux, Kernel 2.6.21 git6
Linux, Kernel 2.6.21 git5
Linux, Kernel 2.6.21 git4
Linux, Kernel 2.6.21 git3
Linux, Kernel 2.6.21 git2
Linux, Kernel 2.6.21 git1
Linux, Kernel 2.6.21 rc7
Linux, Kernel 2.6.21 rc6
Linux, Kernel 2.6.21 rc5
Linux, Kernel 2.6.21
Linux, Kernel 2.6.21 rc3
Linux, Kernel 2.6.21 rc4
Linux, Kernel 2.6.21.1
Linux, Kernel 2.6.21.2
Linux, Kernel 2.6.21.3
Linux, Kernel 2.6.21.4
Linux, Kernel 2.6.21.5
Linux, Kernel 2.6.21.6
Linux, Kernel 2.6.21.7
Linux, Kernel 2.6.22 rc6
Linux, Kernel 2.6.22
Linux, Kernel 2.6.22 rc7
Linux, Kernel 2.6.22 rc1
Linux, Kernel 2.6.22.1
Linux, Kernel 2.6.22.2
Linux, Kernel 2.6.22.3
Linux, Kernel 2.6.22.4
Linux, Kernel 2.6.22.5
Linux, Kernel 2.6.22.6
Linux, Kernel 2.6.22.7
Linux, Kernel 2.6.3 rc1
Linux, Kernel 2.6.3
Linux, Kernel 2.6.3 rc4
Linux, Kernel 2.6.3 rc3
Linux, Kernel 2.6.3 rc2
Linux, Kernel 2.6.4
Linux, Kernel 2.6.4 rc3
Linux, Kernel 2.6.4 rc2
Linux, Kernel 2.6.4 rc1
Linux, Kernel 2.6.5
Linux, Kernel 2.6.5 rc3
Linux, Kernel 2.6.5 rc2
Linux, Kernel 2.6.5 rc1
Linux, Kernel 2.6.6 rc1
Linux, Kernel 2.6.6
Linux, Kernel 2.6.6 rc3
Linux, Kernel 2.6.6 rc2
Linux, Kernel 2.6.7
Linux, Kernel 2.6.7 rc3
Linux, Kernel 2.6.7 rc2
Linux, Kernel 2.6.7 rc1
Linux, Kernel 2.6.8
Linux, Kernel 2.6.8 rc4
Linux, Kernel 2.6.8 rc3
Linux, Kernel 2.6.8 rc2
Linux, Kernel 2.6.8 rc1
Linux, Kernel 2.6.8.1
Linux, Kernel 2.6.9
Linux, Kernel 2.6.9 rc4
Linux, Kernel 2.6.9 rc3
Linux, Kernel 2.6.9 rc2
Linux, Kernel 2.6.9 rc1
Novell, Linux Desktop 9
Novell, Linux POS 9
Novell, Open Enterprise Server
Novell, Open Enterprise Server
Novell, OpenSUSE 10.2
Novell, OpenSUSE 10.3
Novell, SLE SDK 10 SP1
Novell, SUSE Linux Enterprise 10 SP1 DEBUGINFO
Novell, SUSE Linux Enterprise Desktop 10 SP1
Novell, SUSE Linux Enterprise Server 10
Novell, SUSE Linux Enterprise Server 10 SP1
Novell, UnitedLinux 1.0
RedHat, Enterprise Linux 4 AS
RedHat, Enterprise Linux 4 Desktop
RedHat, Enterprise Linux 4 ES
RedHat, Enterprise Linux 4 WS
RedHat, Enterprise Linux 5
RedHat, Enterprise Linux 5 Client
SuSE, SLE SDK 10
SuSE, SuSE Linux
SuSE, SuSE Linux Enterprise Server 9.0
SuSE, SuSE Linux Retail Solution 8
SuSE, SuSE SLES 9

Remedy:

Upgrade to the latest version of Linux kernel (2.6.22.8 or later), available from the Linux Kernel Archives Web site. See References.

For other distributions:
Apply the appropriate update for your system. See References.

Consequences:

Obtain Information

References:

iDefense PUBLIC ADVISORY: 09.25.07, Linux Kernel ALSA snd_mem_proc_read Information Disclosure Vulnerability at http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=600.
Kernel.org Web site, Mon Sep 24 23:05:13 2007 -0700, Convert snd-page-alloc proc file to use seq_file (CVE-2007-4571) at http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.22.8.
The Linux Kernel Archives Web site, The Linux Kernel Archives at http://www.kernel.org/.
ASA-2007-474: kernel security update (RHSA-2007-0939)
BID-25807: Linux Kernel ALSA snd-page-alloc Local Proc File Information Disclosure Vulnerability
CVE-2007-4571: 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.
DSA-1479: linux-2.6 -- several vulnerabilities
DSA-1505: alsa-driver -- kernel memory leak
FrSIRT/ADV-2007-3272: Linux Kernel ALSA snd_mem_proc_read() Information Disclosure Issue
RHSA-2007-0939: Important: kernel security update
RHSA-2007-0993: Important: kernel security update
SA26918: Linux Kernel ALSA "snd_mem_proc_read()" Information Disclosure
SA27747: Avaya Products Kernel Multiple Vulnerabilities
SECTRACK ID: 1018734: Linux Kernel ALSA Driver snd_mem_proc_read() Function Discloses Kernel Memory to Local Users
SUSE-SA:2007:053: Linux kernel privilege escalation
USN-618-1: Linux kernel vulnerabilities

Reported:

Sep 25, 2007

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 the author/distributor (Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email xforce@iss.net

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