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Sicherheit: Zwei Probleme in QEMU
Aktuelle Meldungen Distributionen
Name: Zwei Probleme in QEMU
ID: MDVSA-2014:249
Distribution: Mandriva
Plattformen: Mandriva Business Server 1.0
Datum: Di, 16. Dezember 2014, 17:53
Referenzen: http://advisories.mageia.org/MGASA-2014-0525.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7840
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8106
Applikationen: QEMU

Originalnachricht

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_______________________________________________________________________

Mandriva Linux Security Advisory MDVSA-2014:249
http://www.mandriva.com/en/support/security/
_______________________________________________________________________

Package : qemu
Date : December 14, 2014
Affected: Business Server 1.0
_______________________________________________________________________

Problem Description:

Updated qemu packages fix security vulnerabilities:

During migration, the values read from migration stream during ram load
are not validated. Especially offset in host_from_stream_offset() and
also the length of the writes in the callers of the said function. A
user able to alter the savevm data (either on the disk or over the
wire during migration) could use either of these flaws to corrupt QEMU
process memory on the (destination) host, which could potentially
result in arbitrary code execution on the host with the privileges
of the QEMU process (CVE-2014-7840).

Paolo Bonzini of Red Hat discovered that the blit region checks were
insufficient in the Cirrus VGA emulator in qemu. A privileged guest
user could use this flaw to write into qemu address space on the host,
potentially escalating their privileges to those of the qemu host
process (CVE-2014-8106).
_______________________________________________________________________

References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7840
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8106
http://advisories.mageia.org/MGASA-2014-0525.html
_______________________________________________________________________

Updated Packages:

Mandriva Business Server 1/X86_64:
2d402807644542a6999844199592ee6a mbs1/x86_64/qemu-1.6.2-1.2.mbs1.x86_64.rpm
cc805ac5a37e0b2c4944d4457cdf2af0
mbs1/x86_64/qemu-img-1.6.2-1.2.mbs1.x86_64.rpm
cebb60ade872fc9e6d8ff7aef1aeafcd mbs1/SRPMS/qemu-1.6.2-1.2.mbs1.src.rpm
_______________________________________________________________________

To upgrade automatically use MandrivaUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.

All packages are signed by Mandriva for security. You can obtain the
GPG public key of the Mandriva Security Team by executing:

gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98

You can view other update advisories for Mandriva Linux at:

http://www.mandriva.com/en/support/security/advisories/

If you want to report vulnerabilities, please contact

security_(at)_mandriva.com
_______________________________________________________________________

Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
<security*mandriva.com>
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_______________________________________________________
Want to buy your Pack or Services from Mandriva?
Go to http://store.mandriva.com
_______________________________________________________


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