Xen up to 5.10.16 PV Backend blkback.c state issue

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
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6.2$5k-$25k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Xen up to 5.10.16. This affects an unknown function of the file drivers/block/xen-blkback/blkback.c of the component PV Backend Handler. Such manipulation leads to state issue. This vulnerability is traded as CVE-2021-26930. There is no exploit available.

Detailsinfo

A vulnerability was found in Xen up to 5.10.16 (Virtualization Software) and classified as critical. Affected by this issue is an unknown functionality of the file drivers/block/xen-blkback/blkback.c of the component PV Backend Handler. The manipulation with an unknown input leads to a state issue vulnerability. Using CWE to declare the problem leads to CWE-371. Impacted is confidentiality, integrity, and availability.

The weakness was shared 02/17/2021. The advisory is shared for download at xenbits.xen.org. This vulnerability is handled as CVE-2021-26930. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (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.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

VulDB Base Score: 4.6
VulDB Temp Score: 4.6
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: State issue
CWE: CWE-371
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-2021-26930 (🔍)
GCVE (CVE): GCVE-0-2021-26930
GCVE (VulDB): GCVE-100-170024

Entryinfo

Created: 02/17/2021 07:58
Updated: 03/02/2021 11:57
Changes: 02/17/2021 07:58 (37), 03/02/2021 11:51 (2), 03/02/2021 11:57 (18)
Complete: 🔍
Cache ID: 216::103

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