Xen up to 4.9.x Shadow Mode input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Xen up to 4.9.x. Affected is an unknown function of the component Shadow Mode. Executing a manipulation can lead to input validation. This vulnerability is registered as CVE-2017-17565. The attack needs to be launched locally. No exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability has been found in Xen up to 4.9.x (Virtualization Software) and classified as critical. This vulnerability affects some unknown functionality of the component Shadow Mode. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Xen through 4.9.x allowing PV guest OS users to cause a denial of service (host OS crash) if shadow mode and log-dirty mode are in place, because of an incorrect assertion related to M2P.

The bug was discovered 12/12/2017. The weakness was published 12/12/2017 by Jan Beulich (Website). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2017-17565 since 12/12/2017. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 105493 (Xen Function M2P Entry Access Handling Guest-to-Host DoS (XSA-251)), 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 databases at Tenable (105493) and SecurityFocus (BID 102175†). Similar entries are available at VDB-110558, VDB-110559, VDB-110561 and VDB-112341. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

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

NVD Base Score: 5.6
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
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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Nessus ID: 105493
Nessus Name: Xen Function M2P Entry Access Handling Guest-to-Host DoS (XSA-251)
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 Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

12/12/2017 🔍
12/12/2017 +0 days 🔍
12/12/2017 +0 days 🔍
12/12/2017 +0 days 🔍
12/12/2017 +0 days 🔍
12/12/2017 +0 days 🔍
12/13/2017 +1 days 🔍
12/29/2017 +16 days 🔍
01/17/2023 +1845 days 🔍

Sourcesinfo

Advisory: DLA 1230-1
Researcher: Jan Beulich
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-17565 (🔍)
GCVE (CVE): GCVE-0-2017-17565
GCVE (VulDB): GCVE-100-110560

OVAL: 🔍

SecurityFocus: 102175 - Xen 'arch/x86/mm/paging.c' Denial of Service vulnerability
SecurityTracker: 1040771

See also: 🔍

Entryinfo

Created: 12/13/2017 08:11
Updated: 01/17/2023 14:14
Changes: 12/13/2017 08:11 (73), 12/14/2019 09:49 (7), 01/27/2021 09:24 (2), 01/17/2023 14:14 (3)
Complete: 🔍
Cache ID: 216::103

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