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AUSCERT External Security Bulletin Redistribution
ESB-2011.0973
linux-2.6 security update
26 September 2011
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: linux-2.6
Publisher: Debian
Operating System: Debian GNU/Linux 5
Impact/Access: Increased Privileges -- Remote/Unauthenticated
Denial of Service -- Existing Account
Access Privileged Data -- Existing Account
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2011-3191 CVE-2011-3188 CVE-2011-2928
CVE-2011-2525 CVE-2011-2497 CVE-2011-2496
CVE-2011-2495 CVE-2011-2492 CVE-2011-2491
CVE-2011-2484 CVE-2011-2213 CVE-2011-2211
CVE-2011-2209 CVE-2011-1768 CVE-2011-1020
CVE-2011-0712 CVE-2009-4067
Reference: ESB-2011.0923.2
ESB-2011.0728
ESB-2011.0658
ESB-2011.0271
Original Bulletin:
http://www.debian.org/security/2011/dsa-2310
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Debian Security Advisory DSA-2310-1 security@debian.org
http://www.debian.org/security/ dann frazier
September 22, 2011 http://www.debian.org/security/faq
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Package : linux-2.6
Vulnerability : privilege escalation/denial of service/information leak
Problem type : local/remote
Debian-specific: no
CVE Id(s) : CVE-2009-4067 CVE-2011-0712 CVE-2011-1020 CVE-2011-2209
CVE-2011-2211 CVE-2011-2213 CVE-2011-2484 CVE-2011-2491
CVE-2011-2492 CVE-2011-2495 CVE-2011-2496 CVE-2011-2497
CVE-2011-2525 CVE-2011-2928 CVE-2011-3188 CVE-2011-3191
Debian Bug : 633738
Several vulnerabilities have been discovered in the Linux kernel that may lead
to a privilege escalation, denial of service or information leak. The Common
Vulnerabilities and Exposures project identifies the following problems:
CVE-2009-4067
Rafael Dominguez Vega of MWR InfoSecurity reported an issue in the auerswald
module, a driver for Auerswald PBX/System Telephone USB devices. Attackers
with physical access to a system's USB ports could obtain elevated
privileges using a specially crafted USB device.
CVE-2011-0712
Rafael Dominguez Vega of MWR InfoSecurity reported an issue in the caiaq
module, a USB driver for Native Instruments USB audio devices. Attackers
with physical access to a system's USB ports could obtain elevated
privileges using a specially crafted USB device.
CVE-2011-1020
Kees Cook discovered an issue in the /proc filesystem that allows local
users to gain access to sensitive process information after execution of a
setuid binary.
CVE-2011-2209
Dan Rosenberg discovered an issue in the osf_sysinfo() system call on the
alpha architecture. Local users could obtain access to sensitive kernel
memory.
CVE-2011-2211
Dan Rosenberg discovered an issue in the osf_wait4() system call on the
alpha architecture permitting local users to gain elevated privileges.
CVE-2011-2213
Dan Rosenberg discovered an issue in the INET socket monitoring interface.
Local users could cause a denial of service by injecting code and causing
the kernel to execute an infinite loop.
CVE-2011-2484
Vasiliy Kulikov of Openwall discovered that the number of exit handlers that
a process can register is not capped, resulting in local denial of service
through resource exhaustion (cpu time and memory).
CVE-2011-2491
Vasily Averin discovered an issue with the NFS locking implementation. A
malicious NFS server can cause a client to hang indefinitely in an unlock
call.
CVE-2011-2492
Marek Kroemeke and Filip Palian discovered that uninitialized struct
elements in the Bluetooth subsystem could lead to a leak of sensitive kernel
memory through leaked stack memory.
CVE-2011-2495
Vasiliy Kulikov of Openwall discovered that the io file of a process' proc
directory was world-readable, resulting in local information disclosure of
information such as password lengths.
CVE-2011-2496
Robert Swiecki discovered that mremap() could be abused for local denial of
service by triggering a BUG_ON assert.
CVE-2011-2497
Dan Rosenberg discovered an integer underflow in the Bluetooth subsystem,
which could lead to denial of service or privilege escalation.
CVE-2011-2525
Ben Pfaff reported an issue in the network scheduling code. A local user
could cause a denial of service (NULL pointer dereference) by sending a
specially crafted netlink message.
CVE-2011-2928
Timo Warns discovered that insufficient validation of Be filesystem images
could lead to local denial of service if a malformed filesystem image is
mounted.
CVE-2011-3188
Dan Kaminsky reported a weakness of the sequence number generation in the
TCP protocol implementation. This can be used by remote attackers to inject
packets into an active session.
CVE-2011-3191
Darren Lavender reported an issue in the Common Internet File System (CIFS).
A malicious file server could cause memory corruption leading to a denial of
service.
This update also includes a fix for a regression introduced with the previous
security fix for CVE-2011-1768 (Debian: #633738)
For the oldstable distribution (lenny), this problem has been fixed in version
2.6.26-26lenny4. Updates for arm and alpha are not yet available, but will be
released as soon as possible. Updates for the hppa and ia64 architectures will
be included in the upcoming 5.0.9 point release.
The following matrix lists additional source packages that were rebuilt for
compatibility with or to take advantage of this update:
Debian 5.0 (lenny)
user-mode-linux 2.6.26-1um-2+26lenny4
We recommend that you upgrade your linux-2.6 and user-mode-linux packages.
These updates will not become active until after your system is rebooted.
Note: Debian carefully tracks all known security issues across every
linux kernel package in all releases under active security support.
However, given the high frequency at which low-severity security
issues are discovered in the kernel and the resource requirements of
doing an update, updates for lower priority issues will normally not
be released for all kernels at the same time. Rather, they will be
released in a staggered or "leap-frog" fashion.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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