----------------------------------------------------------------------

Secunia is hiring!

Find your next job here:

http://secunia.com/company/jobs/

----------------------------------------------------------------------

TITLE:
Qemu "process_tx_desc()" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA47740

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47740/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47740

RELEASE DATE:
2012-01-24

DISCUSS ADVISORY:
http://secunia.com/advisories/47740/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/47740/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=47740

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A vulnerability has been reported in Qemu, which can be exploited by
malicious, local users in a guest virtual machine to potentially gain
escalated privileges.

The vulnerability is caused due to a boundary error within the
"process_tx_desc()" function (hw/e1000.c) when handling legacy mode
packets while reading DMA requests. This can be exploited to cause a
heap-based buffer overflow via a specially crafted packet.

SOLUTION:
Fixed in the GIT repository.

Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

PROVIDED AND/OR DISCOVERED BY:
Red Hat credits Nicolae Mogoreanu.

ORIGINAL ADVISORY:
https://bugzilla.redhat.com/show_bug.cgi?id=772075

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------