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Linux Kernel ASN.1 BER Decoding Vulnerability
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Secunia Advisory:
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SA30580
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Release Date:
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2008-06-09
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Popularity:
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6,145 views
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Critical:
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Moderately critical
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Impact:
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DoS
System access
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| OS: | Linux Kernel 2.4.x
Linux Kernel 2.6.x
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Binary Analysis:
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BA494 :: Available for 1 Credit 
BA498 :: Available for 1 Credit
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| CVE reference: | CVE-2008-1673
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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 Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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