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Date: Thu, 6 Aug 2015 10:32:03 -0400 (EDT)
From: cve-assign@...re.org
To: ppandit@...hat.com
Cc: cve-assign@...re.org, oss-security@...ts.openwall.com
Subject: Re: CVE request: Qemu: buffer overflow in virtio-serial
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> https://github.com/qemu/qemu/commit/7882080388be5088e72c425b02223c02e6cb4295
> https://lists.gnu.org/archive/html/qemu-devel/2015-07/msg05458.html
> Don't assume a specific layout for control messages.
> hw/char/virtio-serial-bus.c
> send_control_msg
> - memcpy(elem.in_sg[0].iov_base, buf, len);
> + /* TODO: detect a buffer that's too short, set NEEDS_RESET */
> + iov_from_buf(elem.in_sg, elem.in_num, 0, buf, len);
> Qemu emulator built with the virtio-serial vmchannel support is vulnerable to
> a buffer overflow issue. It could occur while exchanging virtio control
> messages between guest & the host.
>
> A malicious guest could use this flaw to corrupt few bytes of Qemu memory
> area, potentially crashing the Qemu process.
Use CVE-2015-5745.
- --
CVE assignment team, MITRE CVE Numbering Authority
M/S M300
202 Burlington Road, Bedford, MA 01730 USA
[ PGP key available through http://cve.mitre.org/cve/request_id.html ]
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