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From: Secunia Security Advisories (sec-adv
secunia.com)
Date: Mon Jun 09 2008 - 17:30:04 CDT
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TITLE:
Linux Kernel ASN.1 BER Decoding Vulnerability
SECUNIA ADVISORY ID:
SA30580
VERIFY ADVISORY:
http://secunia.com/advisories/30580/
CRITICAL:
Moderately critical
IMPACT:
DoS, System access
WHERE:
From local network
OPERATING SYSTEM:
Linux Kernel 2.4.x
http://secunia.com/product/763/
Linux Kernel 2.6.x
http://secunia.com/product/2719/
DESCRIPTION:
A vulnerability has been reported in the Linux Kernel, which can be
exploited by malicious people to cause a DoS (Denial of Service) and
potentially compromise a vulnerable system.
The vulnerability is caused due to an error within the ASN.1 BER
decoder of the cifs and ip_nat_snmp_basic modules when calculating
the buffer size. This can be exploited to cause a crash or
potentially execute arbitrary code by sending specially crafted BER
encoded data to a vulnerable system.
The vulnerability is reported in versions prior to 2.4.36.6 of the
2.4 branch and prior to version 2.6.25.5 of the 2.6 branch.
SOLUTION:
Update to a fixed version.
Linux Kernel 2.4 branch:
Update to version 2.4.36.6 or later.
Linux Kernel 2.6 branch:
Update to version 2.6.25.5 or later.
PROVIDED AND/OR DISCOVERED BY:
Wei Wang, McAfee
ORIGINAL ADVISORY:
http://kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.36.6
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25.5
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About:
This Advisory was delivered by Secunia as a free service to help
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vulnerabilities.
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