CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.9 | $0-$5k | 0.00 |
A vulnerability classified as problematic has been found in XenSource Xen (Virtualization Software) (unknown version). This affects an unknown code block of the component Debug Exception Handler. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:
The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host OS panic or hang) by triggering many #DB (aka Debug) exceptions, related to svm.c.
The weakness was shared 11/10/2015 by Jan Beulich with Google as XSA-156 as confirmed security advisory (Website). It is possible to read the advisory at xenbits.xen.org. This vulnerability is uniquely identified as CVE-2015-8104 since 11/09/2015. The exploitability is told to be easy. Attacking locally is a requirement. No form of 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 87012 (Citrix XenServer Multiple Infinite Loop Guest-to-Host DoS (CTX202583)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370034 (Citrix XenServer Security Update (CTX202583)).
Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at X-Force (107921) and Tenable (87012). The entries 79118, 80580 and 90094 are related to this item.
Product
Type
Vendor
Name
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: 6.8VulDB Meta Temp Score: 5.9
VulDB Base Score: 6.8
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Resource managementCWE: CWE-399 / CWE-404
ATT&CK: Unknown
Local: Yes
Remote: No
Availability: 🔍
Status: Unproven
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 87012
Nessus Name: Citrix XenServer Multiple Infinite Loop Guest-to-Host DoS (CTX202583)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 703414
OpenVAS Name: Debian Security Advisory DSA 3414-1 (xen - security update)
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: git.kernel.org
Timeline
11/05/2015 🔍11/09/2015 🔍
11/10/2015 🔍
11/10/2015 🔍
11/10/2015 🔍
11/11/2015 🔍
11/12/2015 🔍
11/16/2015 🔍
11/23/2015 🔍
06/26/2022 🔍
Sources
Vendor: citrix.comAdvisory: XSA-156
Researcher: Jan Beulich
Organization: Google
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2015-8104 (🔍)
OVAL: 🔍
X-Force: 107921 - Xen debug exception denial of service
SecurityTracker: 1034105
Vulnerability Center: 54372 - Microsoft Windows Hyper-V Local DoS via CPU Chipsets - CVE-2015-8104, Medium
SecurityFocus: 77524 - Linux Kernel CVE-2015-8104 Denial of Service Vulnerability
See also: 🔍
Entry
Created: 11/11/2015 09:55Updated: 06/26/2022 14:29
Changes: 11/11/2015 09:55 (61), 04/12/2018 17:06 (20), 06/26/2022 14:29 (3)
Complete: 🔍
No comments yet. Languages: en.
Please log in to comment.