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Message-ID: <nycvar.YSQ.7.76.1810171256410.14417@xnncv>
Date: Wed, 17 Oct 2018 12:59:01 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Arash TC <tohidi.arash@...il.com>
Subject: CVE-2018-18438 Qemu: Integer overflow in ccid_card_vscard_read()
allows memory corruption
Hello,
An integer overflow issue was found in the CCID Passthru card device
emulation, while reading card data in ccid_card_vscard_read() function. The
ccid_card_vscard_read() function accepts a signed integer 'size' argument,
which is subsequently used as unsigned size_t value in memcpy(), copying large
amounts of memory.
A user inside guest could use this flaw to crash the Qemu process resulting in
DoS.
Upstream patch:
---------------
-> https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02396.html
-> https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02402.html
This issue was reported by Arash Tohidi. CVE requested via -> https://cveform.mitre.org/
Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F
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