Xen SCSI Backend blkback.c allocation of resources

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Xen. This impacts an unknown function of the file drivers/block/xen-blkback/blkback.c of the component SCSI Backend Handler. Performing a manipulation results in allocation of resources. This vulnerability is known as CVE-2021-26931. No exploit is available.

Detailsinfo

A vulnerability was found in Xen (Virtualization Software) (affected version not known). It has been classified as problematic. This affects some unknown functionality of the file drivers/block/xen-blkback/blkback.c of the component SCSI Backend Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability.

The weakness was published 02/17/2021. The advisory is shared at xenbits.xen.org. This vulnerability is uniquely identified as CVE-2021-26931. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/02/2021).

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

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

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.7
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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

02/09/2021 🔍
02/17/2021 +8 days 🔍
02/17/2021 +0 days 🔍
03/02/2021 +13 days 🔍

Sourcesinfo

Advisory: xenbits.xen.org
Status: Confirmed

CVE: CVE-2021-26931 (🔍)
GCVE (CVE): GCVE-0-2021-26931
GCVE (VulDB): GCVE-100-170025

Entryinfo

Created: 02/17/2021 08:09
Updated: 03/02/2021 12:05
Changes: 02/17/2021 08:09 (36), 03/02/2021 12:00 (2), 03/02/2021 12:05 (18)
Complete: 🔍
Cache ID: 216::103

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

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