CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.3 | $0-$5k | 0.00 |
A vulnerability, which was classified as problematic, has been found in Citrix Xen 3.4.0/4.0.0/4.1.0 (Connectivity Software). This issue affects an unknown code. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:
Xen 3.4, 4.0, and 4.1, when the guest OS has not registered a handler for a syscall or sysenter instruction, does not properly clear a flag for exception injection when injecting a General Protection Fault, which allows local PV guest OS users to cause a denial of service (guest crash) by later triggering an exception that would normally be handled within Xen.
The weakness was published 06/12/2012 as Xen Security Advisory 8 as confirmed advisory (Website). It is possible to read the advisory at lists.xen.org. The identification of this vulnerability is CVE-2012-0218 since 12/14/2011. Attacking locally is a requirement. A simple authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.
The vulnerability scanner Nessus provides a plugin with the ID 59779 (Debian DSA-2501-1 : 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 370050 (Citrix XenServer Security Update (CTX133161)).
Applying a patch is able to eliminate this problem. The bugfix is ready for download at support.citrix.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at X-Force (76227), Tenable (59779), SecurityFocus (BID 53955†), OSVDB (82934†) and Secunia (SA49381†).
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.5VulDB Meta Temp Score: 5.3
VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Denial of serviceCWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Nessus ID: 59779
Nessus Name: Debian DSA-2501-1 : xen - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
OpenVAS ID: 71479
OpenVAS Name: Debian Security Advisory DSA 2501-1 (xen)
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Patch: support.citrix.com
Timeline
12/14/2011 🔍06/12/2012 🔍
06/12/2012 🔍
06/12/2012 🔍
06/12/2012 🔍
06/12/2012 🔍
06/13/2012 🔍
06/20/2012 🔍
11/15/2012 🔍
12/03/2012 🔍
03/25/2021 🔍
Sources
Vendor: citrix.comAdvisory: Xen Security Advisory 8
Status: Confirmed
CVE: CVE-2012-0218 (🔍)
OVAL: 🔍
X-Force: 76227
SecurityFocus: 53955 - Xen 'syscall/sysenter' Instruction Local Denial of Service Vulnerability
Secunia: 49381 - Xen Privilege Escalation and Denial of Service Vulnerabilities, Less Critical
OSVDB: 82934
SecurityTracker: 1027167 - Xen Syscall Exception Handling Error Lets Local Guest Users Deny Service
Vulnerability Center: 37254 - Citrix XenServer and XenSource Xen Local Denial of Service - CVE-2012-0218, Low
Entry
Created: 06/20/2012 11:24Updated: 03/25/2021 16:21
Changes: 06/20/2012 11:24 (79), 04/21/2017 11:35 (5), 03/25/2021 16:21 (3)
Complete: 🔍
Cache ID: 18:797:103
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