Xen 4.11 x86 IOREQ Server resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Xen 4.11. It has been rated as critical. Impacted is an unknown function of the component x86 IOREQ Server. The manipulation leads to resource management. This vulnerability is referenced as CVE-2018-19963. The attack can only be performed from a local environment. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Xen 4.11 (Virtualization Software) and classified as critical. This issue affects an unknown function of the component x86 IOREQ Server. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Xen 4.11 allowing HVM guest OS users to cause a denial of service (host OS crash) or possibly gain host OS privileges because x86 IOREQ server resource accounting (for external emulators) was mishandled.

The bug was discovered 11/20/2018. The weakness was published 12/08/2018 by Security Team (Matt) (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2018-19963 since 12/07/2018. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 119657 (Xen Project x86 IOREQ Server Resource Accounting DoS (XSA-276)), 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 171795 (SUSE Enterprise Linux Security Update for xen (SUSE-SU-2019:0003-1)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (119657) and SecurityFocus (BID 106182†). Similar entries are available at VDB-107985, VDB-123007, VDB-127713 and VDB-127714. Statistical analysis made it clear that VulDB provides the best quality 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: 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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
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: 119657
Nessus Name: Xen Project x86 IOREQ Server Resource Accounting DoS (XSA-276)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/20/2018 🔍
11/20/2018 +0 days 🔍
12/07/2018 +17 days 🔍
12/07/2018 +0 days 🔍
12/07/2018 +0 days 🔍
12/08/2018 +1 days 🔍
12/08/2018 +0 days 🔍
12/13/2018 +5 days 🔍
04/19/2020 +493 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Security Team (Matt)
Status: Confirmed

CVE: CVE-2018-19963 (🔍)
GCVE (CVE): GCVE-0-2018-19963
GCVE (VulDB): GCVE-100-127715
SecurityFocus: 106182 - Xen Multiple Privilege Escalation and Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 12/08/2018 13:38
Updated: 04/19/2020 09:15
Changes: 12/08/2018 13:38 (68), 04/19/2020 09:15 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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