Citrix Hypervisor 8.2 LTSR denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in Citrix Hypervisor 8.2 LTSR and classified as problematic. Affected is an unknown function. This manipulation causes denial of service. The identification of this vulnerability is CVE-2021-20257. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Citrix Hypervisor 8.2 LTSR (Virtualization Software). It has been declared as critical. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was shared 06/27/2021 as CTX316325. The advisory is shared at support.citrix.com. This vulnerability is known as CVE-2021-20257. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 209571 (Oracle Linux 8 : virt:kvm_utils3 (ELSA-2024-12792)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at support.citrix.com.

The vulnerability is also documented in the vulnerability database at Tenable (209571). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 209571
Nessus Name: Oracle Linux 8 : virt:kvm_utils3 (ELSA-2024-12792)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: support.citrix.com

Timelineinfo

12/17/2020 🔍
06/27/2021 +191 days 🔍
06/27/2021 +0 days 🔍
10/25/2024 +1216 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: CTX316325
Status: Confirmed

CVE: CVE-2021-20257 (🔍)
GCVE (CVE): GCVE-0-2021-20257
GCVE (VulDB): GCVE-100-177649

Entryinfo

Created: 06/27/2021 16:05
Updated: 10/25/2024 20:36
Changes: 06/27/2021 16:05 (32), 07/03/2021 02:34 (8), 10/25/2024 20:36 (16)
Complete: 🔍
Cache ID: 216::103

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

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