Xen up to 4.10.x QMP Live HVM Guest information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Xen up to 4.10.x. This vulnerability affects unknown code of the component QMP Live. This manipulation as part of HVM Guest causes information disclosure. This vulnerability is registered as CVE-2018-10472. The attack needs to be launched locally. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Xen up to 4.10.x (Virtualization Software) and classified as problematic. Affected by this vulnerability is some unknown functionality of the component QMP Live. The manipulation as part of a HVM Guest leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users (in certain configurations) to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot.

The bug was discovered 04/25/2018. The weakness was published 04/27/2018 with Citrix as XSA-258 as confirmed security advisory (Website). It is possible to read the advisory at xenbits.xen.org. This vulnerability is known as CVE-2018-10472 since 04/27/2018. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 109677 (SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:1184-1) (Meltdown)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171122 (SUSE Enterprise Linux Security Update for xen (SUSE-SU-2018:1181-1)).

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 (109677) and SecurityFocus (BID 104002†). Similar entry is available at VDB-117174. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.1

VulDB Base Score: 2.8
VulDB Temp Score: 2.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.6
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: 109677
Nessus Name: SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:1184-1) (Meltdown)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 54741
OpenVAS Name: Fedora Update for xen FEDORA-2018-604574c943
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

04/25/2018 🔍
04/25/2018 +0 days 🔍
04/27/2018 +1 days 🔍
04/27/2018 +0 days 🔍
04/27/2018 +0 days 🔍
04/27/2018 +0 days 🔍
04/29/2018 +2 days 🔍
05/10/2018 +11 days 🔍
02/01/2020 +632 days 🔍

Sourcesinfo

Advisory: XSA-258
Organization: Citrix
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-10472 (🔍)
GCVE (CVE): GCVE-0-2018-10472
GCVE (VulDB): GCVE-100-117175

OVAL: 🔍

SecurityFocus: 104002 - Xen XSA-258 Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 04/29/2018 10:12
Updated: 02/01/2020 08:45
Changes: 04/29/2018 10:12 (79), 02/01/2020 08:45 (5)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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