Citrix Xen 2.2.0 domain_pirq_to_emuirq pirg denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Citrix Xen 2.2.0. This impacts the function domain_pirq_to_emuirq. Performing a manipulation of the argument pirg results in denial of service. This vulnerability is cataloged as CVE-2012-4536. There is no exploit available. It is recommended that the affected component be replaced with an alternative.

Detailsinfo

A vulnerability classified as problematic has been found in Citrix Xen 2.2.0 (Connectivity Software). This affects the function domain_pirq_to_emuirq. The manipulation of the argument pirg with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 allows local guest OS administrators to cause a denial of service (Xen crash) via a crafted pirq value that triggers an out-of-bounds read.

The bug was discovered 11/13/2012. The weakness was shared 11/13/2012 as confirmed advisory (Website). It is possible to read the advisory at lists.xen.org. This vulnerability is uniquely identified as CVE-2012-4536 since 08/21/2012. The exploitability is told to be easy. Attacking locally is a requirement. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 63009 (Fedora 17 : xen-4.1.3-6.fc17 (2012-18242)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370051 (Citrix XenServer Security Update (CTX135458)).

The problem might be mitigated by replacing the product with VMware as an alternative. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (80023), Tenable (63009), SecurityFocus (BID 56498†), OSVDB (87297†) and Secunia (SA51200†). The entries VDB-6940, VDB-6947, VDB-6948 and VDB-6949 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.4

VulDB Base Score: 6.2
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 63009
Nessus Name: Fedora 17 : xen-4.1.3-6.fc17 (2012-18242)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 864881
OpenVAS Name: Fedora Update for xen FEDORA-2012-18242
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Alternative
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Alternative: VMware

Timelineinfo

08/21/2012 🔍
11/13/2012 +84 days 🔍
11/13/2012 +0 days 🔍
11/13/2012 +0 days 🔍
11/13/2012 +0 days 🔍
11/13/2012 +0 days 🔍
11/14/2012 +1 days 🔍
11/14/2012 +0 days 🔍
11/14/2012 +0 days 🔍
11/16/2012 +2 days 🔍
11/21/2012 +5 days 🔍
11/28/2012 +7 days 🔍
04/19/2021 +3064 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: lists.xen.org
Status: Confirmed

CVE: CVE-2012-4536 (🔍)
GCVE (CVE): GCVE-0-2012-4536
GCVE (VulDB): GCVE-100-6939
X-Force: 80023 - Xen domain_pirq_to_emuirq() denial of service, Medium Risk
SecurityFocus: 56498 - Xen Multiple Denial of Service Vulnerabilities
Secunia: 51200 - Xen Multiple Denial of Service Vulnerabilities, Not Critical
OSVDB: 87297
SecurityTracker: 1027760 - Xen priq Range Check Flaw Lets Local Guest Administrative Users Deny Service on the Host Operating System
Vulnerability Center: 37449 - XenSource and Citrix XenServer Local Guest Administrators Denial of Service - CVE-2012-4536, Low

See also: 🔍

Entryinfo

Created: 11/16/2012 10:16
Updated: 04/19/2021 11:27
Changes: 11/16/2012 10:16 (84), 04/22/2017 09:09 (5), 04/19/2021 11:27 (3)
Complete: 🔍
Committer:
Cache ID: 216:271:103

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