Home / vulnerabilities Secunia Security Advisory 52071
Posted on 15 February 2013
Source : packetstormsecurity.org Link
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TITLE:
Xen "xen_iret()" IRET Handling Denial of Service Weakness
SECUNIA ADVISORY ID:
SA52071
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/52071/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=52071
RELEASE DATE:
2013-02-14
DISCUSS ADVISORY:
http://secunia.com/advisories/52071/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
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* Impact
* Where
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* CVE Reference(s)
http://secunia.com/advisories/52071/
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https://ca.secunia.com/?page=viewadvisory&vuln_id=52071
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http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
A weakness has been reported in Xen, which can be exploited by
malicious, local users in a guest virtual machine to cause a DoS
(Denial of Service).
The weakness is caused due to an error within "xen_iret()" when
handling an IRET (Interrupt Return) and can be exploited to cause a
crash.
Successful exploitation requires that a 32-bit ParaVirtual OPerationS
(PVOPS) guest is used.
SOLUTION:
Apply patch
xsa42-pvops-0001-x86-xen-don-t-assume-ds-is-usable-in-xen_iret-for-32.patch
PROVIDED AND/OR DISCOVERED BY:
Drew Jones
ORIGINAL ADVISORY:
XSA-42:
http://www.openwall.com/lists/oss-security/2013/02/13/10
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
DEEP LINKS:
Further details available in Customer Area:
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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/
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