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[SA25594] Linux Kernel Multiple Vulnerabilities
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TITLE:
Linux Kernel Multiple Vulnerabilities
SECUNIA ADVISORY ID:
SA25594
VERIFY ADVISORY:
link://[click]
CRITICAL:
Moderately critical
IMPACT:
Brute force, Exposure of sensitive information, DoS
WHERE:
From remote
OPERATING SYSTEM:
Linux Kernel 2.6.x
link://[click]
DESCRIPTION:
Two vulnerabilities and a weakness have been reported in the Linux
Kernel, which can be exploited by malicious, local users to disclose
potentially sensitive information and malicious people to cause a DoS
(Denial of Service).
1) A NULL-pointer dereference exists within netfilter when handling
new SCTP connections with unknown chunk types. This can be exploited
to crash the kernel by sending malicious packets.
2) An underflow error within the "cpuset_task_read()" function in
/kernel/cpuset.c can be exploited to read kernel memory, which may
contain potentially sensitive information.
3) The kernel does not handle seeds for the random number generator
correctly. This may weaken the security of applications relying on
the randomness of the kernel random number generator.
SOLUTION:
Update to version 2.6.21.4.
PROVIDED AND/OR DISCOVERED BY:
1) Vilmos Nebehaj
2, 3) Reported by the vendor.
ORIGINAL ADVISORY:
link://[click]
About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
link://[click]
Definitions: (Criticality, Where etc.)
link://[click]
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
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