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AUSCERT External Security Bulletin Redistribution
[DLA 1781-1] qemu security update
10 May 2019
AusCERT Security Bulletin Summary
Operating System: Debian GNU/Linux 8
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
CVE Names: CVE-2019-9824 CVE-2018-20815 CVE-2018-18849
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Package : qemu
Version : 1:2.1+dfsg-12+deb8u11
CVE ID : CVE-2018-11806 CVE-2018-18849 CVE-2018-20815 CVE-2019-9824
Debian Bug : 901017 912535
Several vulnerabilities were found in QEMU, a fast processor emulator:
It was found that the SLiRP networking implementation could use a wrong
size when reallocating its buffers, which can be exploited by a
priviledged user on a guest to cause denial of service or possibly
arbitrary code execution on the host system.
It was found that the LSI53C895A SCSI Host Bus Adapter emulation was
susceptible to an out of bounds memory access, which could be leveraged
by a malicious guest user to crash the QEMU process.
A heap buffer overflow was found in the load_device_tree function,
which could be used by a malicious user to potentially execute
arbitrary code with the priviledges of the QEMU process.
William Bowling discovered that the SLiRP networking implementation did
not handle some messages properly, which could be triggered to leak
memory via crafted messages.
For Debian 8 "Jessie", these problems have been fixed in version
We recommend that you upgrade your qemu packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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