[security-alerts] FW: [SA19083] Linux Kernel Local Denial of Service Vulnerabilities

["Kazennov, Vladimir" <Vladimir.Kazennov@xxxxxxxxxx>]

> 
> 
> TITLE:
> Linux Kernel Local Denial of Service Vulnerabilities
> 
> SECUNIA ADVISORY ID:
> SA19083
> 
> VERIFY ADVISORY:
> http://secunia.com/advisories/19083/
> 
> CRITICAL:
> Not critical
> 
> IMPACT:
> DoS
> 
> WHERE:
> Local system
> 
> OPERATING SYSTEM:
> Linux Kernel 2.6.x
> http://secunia.com/product/2719/
> 
> DESCRIPTION:
> Some vulnerabilities have been reported in the Linux kernel, which
> can be exploited by malicious, local users to cause a DoS (Denial of
> Service).
> 
> 1) An error in the "nfs_get_user_pages()" function due to
> insufficient checks on the return value returned by the
> "get_user_pages()" function can be exploited to cause a local DoS by
> performing an O_DIRECT write to an NFS file where the user buffer
> starts with a valid mapped page, but also contains an unmapped page.
> 
> 2) Missing checks for bad elf entry addresses can be exploited to
> cause an endless recursive fault on Intel systems, which results in a
> local DoS.
> 
> An error in the XFS "ftruncate()" function, which may expose stale
> data off disk to users, has also been reported.
> 
> SOLUTION:
> Update to version 2.6.15.5.
> http://kernel.org/
> 
> PROVIDED AND/OR DISCOVERED BY:
> Reported by vendor.
> 
> ORIGINAL ADVISORY:
> http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.15.5
>