| Description: | Description:
The remote host is missing an update to linux-image-2.6.38-11-generic
announced via advisory USN-1211-1.
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)
Vasiliy Kulikov and Dan Rosenberg discovered that ecryptfs did not
correctly check the origin of mount points. A local attacker could exploit
this to trick the system into unmounting arbitrary mount points, leading to
a denial of service. (CVE-2011-1833)
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)
It was discovered that GFS2 did not correctly check block sizes. A local
attacker could exploit this to crash the system, leading to a denial of
service. (CVE-2011-2689)
Fernando Gont discovered that the IPv6 stack used predictable fragment
identification numbers. A remote attacker could exploit this to exhaust
network resources, leading to a denial of service. (CVE-2011-2699)
The performance counter subsystem did not correctly handle certain
counters. A local attacker could exploit this to crash the system, leading
to a denial of service. (CVE-2011-2918)
Solution:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.04:
linux-image-2.6.38-11-generic 2.6.38-11.50
linux-image-2.6.38-11-generic-pae 2.6.38-11.50
linux-image-2.6.38-11-omap 2.6.38-11.50
linux-image-2.6.38-11-powerpc 2.6.38-11.50
linux-image-2.6.38-11-powerpc-smp 2.6.38-11.50
linux-image-2.6.38-11-powerpc64-smp 2.6.38-11.50
linux-image-2.6.38-11-server 2.6.38-11.50
linux-image-2.6.38-11-versatile 2.6.38-11.50
linux-image-2.6.38-11-virtual 2.6.38-11.50
http://www.securityspace.com/smysecure/catid.html?in=USN-1211-1
CVSS Score:
4.9
CVSS Vector:
AV:L/AC:L/Au:NR/C:N/I:N/A:C
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