Citrix Xen 4.2.0/6.0.2 Grand Table GNTTABOP_swap_grant_ref access control

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Citrix Xen 4.2.0/6.0.2. This affects the function GNTTABOP_swap_grant_ref of the component Grand Table. The manipulation leads to access control. This vulnerability is listed as CVE-2012-3516. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Citrix Xen 4.2.0/6.0.2 (Connectivity Software). This issue affects the function GNTTABOP_swap_grant_ref of the component Grand Table. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The GNTTABOP_swap_grant_ref sub-operation in the grant table hypercall in Xen 4.2 and Citrix XenServer 6.0.2 allows local guest kernels or administrators to cause a denial of service (host crash) and possibly gain privileges via a crafted grant reference that triggers a write to an arbitrary hypervisor memory location.

The weakness was presented 09/05/2012 as 2012-09/msg00004 as confirmed posting (Maillist). The advisory is shared at lists.xen.org. The public release was coordinated in cooperation with Citrix. The identification of this vulnerability is CVE-2012-3516 since 06/14/2012. An attack has to be approached locally. A simple authentication is required for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 370049 (Citrix XenServer Security Update (CTX134708)).

Applying the patch xsa18 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 SecurityFocus (BID 55411†), OSVDB (85201†), Secunia (SA50472†) and SecurityTracker (ID 1027485†). See VDB-5876, VDB-5927, VDB-6105 and VDB-6107 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: xsa18

Timelineinfo

06/14/2012 🔍
09/05/2012 +83 days 🔍
09/05/2012 +0 days 🔍
09/05/2012 +0 days 🔍
09/05/2012 +0 days 🔍
09/05/2012 +0 days 🔍
09/07/2012 +2 days 🔍
09/10/2012 +3 days 🔍
11/23/2012 +74 days 🔍
04/29/2018 +1983 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: 2012-09/msg00004
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-3516 (🔍)
GCVE (CVE): GCVE-0-2012-3516
GCVE (VulDB): GCVE-100-6113
SecurityFocus: 55411
Secunia: 50472 - Xen Multiple Denial of Service and Privilege Escalation Vulnerabilities, Less Critical
OSVDB: 85201
SecurityTracker: 1027485

See also: 🔍

Entryinfo

Created: 09/10/2012 14:15
Updated: 04/29/2018 10:34
Changes: 09/10/2012 14:15 (66), 04/29/2018 10:34 (7)
Complete: 🔍
Committer: olku
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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