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Date: Mon, 8 Dec 2014 13:45:12 +0100
From: Vasyl Kaigorodov <vkaigoro@...hat.com>
To: oss-security@...ts.openwall.com
Cc: 772008@...s.debian.org
Subject: CVE request: mpfr: buffer overflow in mpfr_strtofr
Hello,
A buffer overflow was reported [1] in mpfr.
This is due to incorrect GMP documentation for mpn_set_str about the
size of a buffer (discussion is at [1]; first fix in the GMP
documentation is at [2]). This bug is present in the MPFR versions
from 2.1.0 (adding mpfr_strtofr) to this one, and can be detected by
running "make check" in a 32-bit ABI under GNU/Linux with alloca
disabled (this is currently possible by using the --with-gmp-build
configure option where alloca has been disabled in the GMP build). It
is fixed by the strtofr patch [3].
Corresponding changeset in the 3.1 branch: 9110 [4].
[1]: https://gmplib.org/list-archives/gmp-bugs/2013-December/003267.html
[2]: https://gmplib.org/repo/gmp-5.1/raw-rev/d19172622a74
[3]: http://www.mpfr.org/mpfr-3.1.2/patch11
[4]: https://gforge.inria.fr/scm/viewvc.php?view=rev&root=mpfr&revision=9110
References:
- https://bugzilla.redhat.com/show_bug.cgi?id=1171701
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=772008
Can a CVE be assigned to this please?
Thanks.
--
Vasyl Kaigorodov | Red Hat Product Security
PGP: 0xABB6E828 A7E0 87FF 5AB5 48EB 47D0 2868 217B F9FC ABB6 E828
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