Re: CVE Request: grep

[Kurt Seifried <kseifried () redhat com>]

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On 12/21/2012 05:19 PM, Seth Arnold wrote:
> Hello Kurt, Steve, all.
>
> Paul, I've included you on Cc: to help determine if several grep
> patches are security-relevant.
>
> A bug reporter [1] that claims he has, or can produce, a code
> execution exploit against grep < 2.11. I've verified that our grep
> 2.10 package segfaults on the amd64 platform with the simple
> reproducer:
>
> $ perl -e 'print "x"x(2**31)' | grep x > /dev/null Segmentation
> fault (core dumped)

Confirmed it segfaults. Would it be possible to get a reproducer for
this issue?

Please use CVE-2012-5667 for this issue.

> This specific problem was patched [2] with the following checkin: 
> http://git.savannah.gnu.org/cgit/grep.git/commit/?id=cbbc1a45b9f843c811905c97c90a5d31f8e6c189
>
>  This checkin adds this text to the NEWS file:
>
> + grep no longer dumps core on lines whose lengths do not fit in
> 'int'. + (e.g., lines longer than 2 GiB on a typical 64-bit host). 
> + Instead, grep either works as expected, or reports an error. + An
> error can occur if not enough main memory is available, or if the +
> GNU C library's regular expression functions cannot handle such
> long lines. + [bug present since "the beginning"]
>
> Please assign a CVE number for this problem.
>
>
> Several other checkins around the 2.11 timeframe also look like
> they may be security-relevant:
>
> PCRE over-long line fix: 
> http://git.savannah.gnu.org/cgit/grep.git/commit/?id=4572ea4649d025e51463d48c2d06a1c66134cdb8
>
>  Integer overflow issues: 
> http://git.savannah.gnu.org/cgit/grep.git/commit/?id=8fcf61523644df42e1905c81bed26838e0b04f91
>
>  Paul, are any security issues fixed with those patches? Did I
> overlook any other patches that need CVE numbers?
>
> Thanks
>
>
> 1: https://bugs.launchpad.net/ubuntu/+source/grep/+bug/1091473 2:
> http://lists.gnu.org/archive/html/bug-grep/2012-12/msg00004.html


- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

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