Linux Kernel KVM Hypervisor information disclosure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.9$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel. Affected by this issue is some unknown functionality of the component KVM Hypervisor. This manipulation causes information disclosure. The identification of this vulnerability is CVE-2020-2732. The attack needs to be done within the local network. There is no exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel (Operating System) (the affected version is unknown). It has been declared as problematic. Affected by this vulnerability is an unknown code of the component KVM Hypervisor. The manipulation with an unknown input 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:

A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.

The weakness was shared 04/08/2020 as Bug 1805135 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2020-2732 since 12/10/2019. The exploitation appears to be difficult. The attack needs to be initiated within the local network. A single authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/09/2020). MITRE ATT&CK project uses the attack technique T1592 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

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Vendor

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.0
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.8
NVD Vector: 🔍

CNA Base Score: 5.8
CNA Vector (Oracle): 🔍

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: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/10/2019 🔍
04/08/2020 +120 days 🔍
04/09/2020 +1 days 🔍
05/18/2024 +1500 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 1805135
Status: Not defined

CVE: CVE-2020-2732 (🔍)
GCVE (CVE): GCVE-0-2020-2732
GCVE (VulDB): GCVE-100-152989

Entryinfo

Created: 04/09/2020 10:30
Updated: 05/18/2024 08:23
Changes: 04/09/2020 10:30 (40), 04/09/2020 10:35 (12), 05/18/2024 08:23 (34)
Complete: 🔍
Cache ID: 216::103

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