Home / mailings [USN-1205-1] Linux kernel (Maverick backport) vulnerabilities
Posted on 13 September 2011
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==========================================================================
Ubuntu Security Notice USN-1205-1
September 13, 2011
linux-lts-backport-maverick vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.04 LTS
Summary:
Multiple kernel flaws have been fixed.
Software Description:
- linux-lts-backport-maverick: Linux kernel backport from Maverick
Details:
It was discovered that the /proc filesystem did not correctly handle
permission changes when programs executed. A local attacker could hold open
files to examine details about programs running with higher privileges,
potentially increasing the chances of exploiting additional
vulnerabilities. (CVE-2011-1020)
Dan Rosenberg discovered that the X.25 Rose network stack did not correctly
handle certain fields. If a system was running with Rose enabled, a remote
attacker could send specially crafted traffic to gain root privileges.
(CVE-2011-1493)
Dan Rosenberg discovered that the DCCP stack did not correctly handle
certain packet structures. A remote attacker could exploit this to crash
the system, leading to a denial of service. (CVE-2011-1770)
Vasiliy Kulikov discovered that taskstats listeners were not correctly
handled. A local attacker could expoit this to exhaust memory and CPU
resources, leading to a denial of service. (CVE-2011-2484)
It was discovered that Bluetooth l2cap and rfcomm did not correctly
initialize structures. A local attacker could exploit this to read portions
of the kernel stack, leading to a loss of privacy. (CVE-2011-2492)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 10.04 LTS:
linux-image-2.6.35-30-generic 2.6.35-30.59~lucid1
linux-image-2.6.35-30-generic-pae 2.6.35-30.59~lucid1
linux-image-2.6.35-30-server 2.6.35-30.59~lucid1
linux-image-2.6.35-30-virtual 2.6.35-30.59~lucid1
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1205-1
CVE-2011-1020, CVE-2011-1493, CVE-2011-1770, CVE-2011-2484,
CVE-2011-2492
Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-backport-maverick/2.6.35-30.59~lucid1
