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Date: Wed, 09 Feb 2011 23:20:36 +0800
From: Eugene Teo <eugene@...hat.com>
To: oss-security@...ts.openwall.com
CC: Dan Rosenberg <dan.j.rosenberg@...il.com>
Subject: Re: CVE request: kernel: btrfs heap overflow
On 02/09/2011 10:27 PM, Dan Rosenberg wrote:
> Commit bf5fc093c5b625e4259203f1cee7ca73488a5620 refactored
> btrfs_ioctl_space_info() and introduced security issues. Since they
> were all introduced at once and fixed at the same time, one CVE should
> suffice.
>
> Due to integer truncation or a signedness error in a typecasted
> comparison, an integer overflow in an allocation size calculation, and
> a failure to properly check bounds when copying data, it was possible
> for an unprivileged user to cause a denial-of-service due to writing
> to an invalid pointer (ZERO_SIZE_PTR) or cause a kernel heap overflow.
>
> -Dan
>
> [1] http://marc.info/?l=linux-kernel&m=129726078708425&w=2
Commit bf5fc093c was introduced very recently - v2.6.37-rc1 Sept last
year. Do we have commercially supported kernels that are affected by this?
Thanks, Eugene
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