Citrix Xen up to 4.2.0 Hypercall GNTTABOP_get_status_frames resource management

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4.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in Citrix Xen up to 4.2.0 and classified as problematic. The affected element is the function GNTTABOP_get_status_frames of the component Hypercall Handler. The manipulation leads to resource management. This vulnerability is uniquely identified as CVE-2012-4539. No exploit exists. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Citrix Xen up to 4.2.0 (Connectivity Software). It has been rated as problematic. This issue affects the function GNTTABOP_get_status_frames of the component Hypercall Handler. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

Xen 4.0 through 4.2, when running 32-bit x86 PV guests on 64-bit hypervisors, allows local guest OS administrators to cause a denial of service (infinite loop and hang or crash) via invalid arguments to GNTTABOP_get_status_frames, aka "Grant table hypercall infinite loop DoS vulnerability."

The weakness was disclosed 11/13/2012 as msg00002 as confirmed posting (Website). It is possible to read the advisory at lists.xen.org. The public release has been coordinated in cooperation with Citrix. The identification of this vulnerability is CVE-2012-4539 since 08/21/2012. Attacking locally is a requirement. A simple authentication is necessary 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 63188 (Debian DSA-2582-1 : xen - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370051 (Citrix XenServer Security Update (CTX135458)).

Applying the patch xsa24 is able to eliminate this problem. The bugfix is ready for download at lists.xen.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (80026), Tenable (63188), SecurityFocus (BID 56498†), OSVDB (87305†) and Secunia (SA51200†). The entries VDB-6939, VDB-6940, VDB-6948 and VDB-6949 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.5
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Resource management
CWE: CWE-399 / 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: 63188
Nessus Name: Debian DSA-2582-1 : xen - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 892582
OpenVAS Name: Debian Security Advisory DSA 2582-1 (xen - several vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: xsa24

Timelineinfo

08/21/2012 🔍
11/13/2012 +84 days 🔍
11/13/2012 +0 days 🔍
11/13/2012 +0 days 🔍
11/13/2012 +0 days 🔍
11/14/2012 +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: msg00002
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2012-4539 (🔍)
GCVE (CVE): GCVE-0-2012-4539
GCVE (VulDB): GCVE-100-6947

OVAL: 🔍

X-Force: 80026 - Xen GNTTABOP_get_status_frames() denial of service, Medium Risk
SecurityFocus: 56498 - Xen Multiple Denial of Service Vulnerabilities
Secunia: 51200 - Xen Multiple Denial of Service Vulnerabilities, Not Critical
OSVDB: 87305
SecurityTracker: 1027763 - Xen Grant Table Hypercall Infinite Loop Lets Local Guest Administrative Users Deny Service
Vulnerability Center: 37451 - XenSource and Citrix XenServer Local Guest Administrators Denial of Service - CVE-2012-4539, Low

See also: 🔍

Entryinfo

Created: 11/16/2012 12:04
Updated: 04/19/2021 12:02
Changes: 11/16/2012 12:04 (87), 04/22/2017 09:10 (6), 04/19/2021 12:02 (3)
Complete: 🔍
Committer: olku
Cache ID: 216:ED8:103

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