Xen up to 4.9.x Shadow Mode data processing

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Xen up to 4.9.x and classified as critical. Affected by this vulnerability is an unknown functionality of the component Shadow Mode. The manipulation leads to data processing. This vulnerability is documented as CVE-2017-17566. The attack needs to be performed locally. There is not any exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Xen up to 4.9.x (Virtualization Software) and classified as critical. This issue affects an unknown part of the component Shadow Mode. The manipulation with an unknown input leads to a data processing vulnerability. Using CWE to declare the problem leads to CWE-19. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Xen through 4.9.x allowing PV guest OS users to cause a denial of service (host OS crash) or gain host OS privileges in shadow mode by mapping a certain auxiliary page.

The bug was discovered 12/12/2017. The weakness was released 12/12/2017 by Jan Beulich (oss-sec). The advisory is shared at openwall.com. The identification of this vulnerability is CVE-2017-17566 since 12/12/2017. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 105490 (Xen PV Guests Internally Used Pages Access Handling Guest-to-Host Privilege Escalation (XSA-248)), 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 (105490) and SecurityFocus (BID 102167†). Entries connected to this vulnerability are available at VDB-110558, VDB-110559, VDB-110560 and VDB-112341. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB 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: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Data processing
CWE: CWE-19
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: 105490
Nessus Name: Xen PV Guests Internally Used Pages Access Handling Guest-to-Host Privilege Escalation (XSA-248)
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-2017-17566 (🔍)
GCVE (CVE): GCVE-0-2017-17566
GCVE (VulDB): GCVE-100-110561

OVAL: 🔍

SecurityFocus: 102167 - Xen '/mm/hap/hap.c' Memory Corruption Vulnerability
SecurityTracker: 1040768

See also: 🔍

Entryinfo

Created: 12/13/2017 08:11
Updated: 01/17/2023 14:16
Changes: 12/13/2017 08:11 (73), 12/14/2019 09:56 (7), 01/27/2021 09:30 (3), 01/17/2023 14:16 (3)
Complete: 🔍
Cache ID: 216::103

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

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