CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.4 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, was found in Xen up to 4.9.x (Virtualization Software). This affects an unknown functionality of the component Error Handler. The manipulation with an unknown input leads to a 7pk error vulnerability. CWE is classifying the issue as CWE-388. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:
An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging incorrect error handling for reference counting in shadow mode.
The bug was discovered 12/12/2017. The weakness was shared 12/12/2017 by Jan Beulich (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2017-17564 since 12/12/2017. 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 105492 (Xen Shadow Mode Page Use Reference Counting Error Handling Guest-to-Host DoS (XSA-250)), 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 170761 (SUSE Enterprise Linux Security Update for xen (SUSE-SU-2018:0438-1)).
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 vulnerability database at Tenable (105492). The entries 110558, 110560, 110561 and 112341 are related to this item.
Product
Type
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: 6.5VulDB Meta Temp Score: 6.4
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.8
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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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: 7pk errorCWE: CWE-388
ATT&CK: Unknown
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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Today | unlock | unlock | unlock | unlock |
Nessus ID: 105492
Nessus Name: Xen Shadow Mode Page Use Reference Counting Error Handling Guest-to-Host DoS (XSA-250)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 63884
OpenVAS Name: Fedora Update for xen FEDORA-2017-5945560816
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: 🔍
Timeline
12/12/2017 🔍12/12/2017 🔍
12/12/2017 🔍
12/12/2017 🔍
12/12/2017 🔍
12/12/2017 🔍
12/13/2017 🔍
12/29/2017 🔍
01/17/2023 🔍
Sources
Advisory: DLA 1230-1Researcher: Jan Beulich
Status: Not defined
Confirmation: 🔍
CVE: CVE-2017-17564 (🔍)
OVAL: 🔍
SecurityTracker: 1040770
SecurityFocus: 102172 - Xen 'mm/shadow/multi.c' Memory Corruption Vulnerability
See also: 🔍
Entry
Created: 12/13/2017 08:11Updated: 01/17/2023 14:12
Changes: 12/13/2017 08:11 (73), 12/14/2019 09:45 (7), 01/27/2021 09:20 (2), 01/17/2023 14:12 (3)
Complete: 🔍
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