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Linux Kernel RTA_MAX Security Issue and Seed Refeed Weakness Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA26244  
Release Date: 2007-07-27

Critical:
Less critical
Impact: Brute force
DoS
Where: From remote
Solution Status: Vendor Patch

OS:Linux Kernel 2.4.x


CVE reference:CVE-2007-2172 (Secunia mirror)

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Description:
A security issue and a weakness have been reported in the Linux Kernel, which potentially can be exploited by malicious people to cause a DoS (Denial of Service) or bypass certain security restrictions.

1) A boundary error due to the use of RTA_MAX instead of RTN_MAX in dn_fib_props[] within dn_fib.c and in fib_props[] within fib_semantics.c can potentially be exploited to cause a DoS.

2) The "xfer_secondary_pool()" function in drivers/char/random.c uses the wrong data to refeed seeds into the random number generator. This may weaken the security of applications relying on the random number generator.

Note: This also fixes a problem introduced by a previous smbfs security patch.

Solution:
Update to version 2.4.35.

Provided and/or discovered by:
1) PaX Team
2) Thomas Graf

Original Advisory:
http://kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.35



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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