CVE-2021-3629 : A flaw was found in Undertow. A potential security issue in flow control handling by the browser over http/2 may potenti

A flaw was found in Undertow. A potential security issue in flow control handling by the browser over http/2 may potentially cause overhead or a denial of service in the server. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.40.Final and prior to 2.2.11.Final.

Published 2022-05-24 19:15:09

Updated 2023-02-07 19:19:58

Source Red Hat, Inc.

View at NVD, CVE.org

Vulnerability category: Denial of service

Threat overview for CVE-2021-3629

Top countries where our scanners detected CVE-2021-3629

Top open port discovered on systems with this issue 80

IPs affected by CVE-2021-3629 3,986

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2021-3629!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-3629

EPSS FAQ

0.09%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 38 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-3629

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:N/A:P	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.9	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	2.2	3.6	NIST
Attack Vector: Network Attack Complexity: High Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-3629

CWE-400 Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

Assigned by:

nvd@nist.gov (Primary)
secalert@redhat.com (Secondary)

References for CVE-2021-3629

https://security.netapp.com/advisory/ntap-20220729-0008/

CVE-2021-3629 Undertow Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1977362

1977362 – (CVE-2021-3629) CVE-2021-3629 undertow: potential security issue in flow control over HTTP/2 may lead to DOS
Issue Tracking;Third Party Advisory

Products affected by CVE-2021-3629