85202 : Xen PHYSDEVOP_get_free_pirq Hypercall Physical IRQ Allocation get_free_pirq Call Return Value Verification Local Privilege Escalation
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Timeline

Disclosure Date
2012-09-05

Description

Xen contains a flaw that may allow an attacker to gain access to unauthorized privileges. The issue is triggered when the PHYSDEVOP_get_free_pirq hypercall fails to confirm its call to get_free_pirq succeeded, resulting in the use of the error code in an array when the call fails. This will allow a local attacker to gain escalated privileges.

Classification

Location: Local Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Upgrade
Exploit: Exploit Unknown
Disclosure: Vendor Verified
OSVDB: Authentication Required

Solution

It has been reported that this issue has been fixed. Upgrade to version 4.1.4, or higher, to address this vulnerability.

Products

Citrix Systems, Inc.
XenServer
5.0
5.0 Update 3
5.6
5.6 FP 1
5.6 SP 2
6.0
6.0.2
The Linux Foundation
Xen
4.1.0
4.1.2
4.1.1
4.1.3
4.1.4 (not affected)

References

Credit

CVSSv2 Score

CVSSv2 Base Score = 6.1
Source: nvd.nist.gov | Generated: 2012-11-26 | Disagree?

Access_vector_0 Access_complexity_2 Authentication_2 Confidentiality_impact_1 Integrity_impact_1 Availability_impact_2

Comments

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