VDB-181609 · CVE-2021-28698 · GCVE-0-2021-28698

Xen Grant Table handler iteration

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 (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	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.
2.5	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Xen. Affected is an unknown function of the component Grant Table handler. This manipulation causes iteration. The identification of this vulnerability is CVE-2021-28698. There is no exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Xen (Virtualization Software) (affected version unknown). It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component Grant Table handler. The manipulation with an unknown input leads to a iteration vulnerability. The CWE definition for the vulnerability is CWE-834. The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed. As an impact it is known to affect availability.

The weakness was shared 08/28/2021. The advisory is shared at xenbits.xenproject.org. This vulnerability is known as CVE-2021-28698. Neither technical details nor an exploit are publicly available.

Applying a patch is able to eliminate this problem.

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

Productinfo

Type

Virtualization Software

Name

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.6
VulDB Meta Temp Score: 2.5

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Iteration
CWE: CWE-834 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/18/2021 🔍
08/28/2021 +162 days 🔍
08/28/2021 +0 days 🔍
09/01/2021 +4 days 🔍

Sourcesinfo

Advisory: xenbits.xenproject.org
Status: Confirmed

CVE: CVE-2021-28698 (🔍)
GCVE (CVE): GCVE-0-2021-28698
GCVE (VulDB): GCVE-100-181609

Entryinfo

Created: 08/28/2021 06:14
Updated: 09/01/2021 14:18
Changes: 08/28/2021 06:14 (36), 09/01/2021 14:18 (2)
Complete: 🔍
Cache ID: 216::103