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List:       oss-security
Subject:    [oss-security] CVE-2018-18438 Qemu: Integer overflow in ccid_card_vscard_read() allows memory corrup
From:       P J P <ppandit () redhat ! com>
Date:       2018-10-17 7:41:01
Message-ID: nycvar.YSQ.7.76.1810171256410.14417 () xnncv
[Download RAW message or body]

   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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