CVE-2021-20220 : A flaw was found in Undertow. A regression in the fix for CVE-2020-10687 was fou

A flaw was found in Undertow. A regression in the fix for CVE-2020-10687 was found. HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own. The highest threat from this vulnerability is to data confidentiality and integrity.

Published 2021-02-23 18:15:13

Updated 2022-02-22 14:53:04

Source Red Hat, Inc.

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2021-20220

Redhat » Undertow
Versions from including (>=) 2.1.0 and before (<) 2.1.6
cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
Matching versions
Redhat » Undertow
Versions before (<) 2.0.34
cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
Matching versions
Netapp » Oncommand Workflow Automation » Version: N/A
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
Matching versions
Netapp » Active Iq Unified Manager » Version: N/A For Vmware Vsphere
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
Matching versions
Netapp » Active Iq Unified Manager » Version: N/A For Windows
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*
Matching versions
Netapp » Active Iq Unified Manager » Version: N/A For Linux
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:*
Matching versions

Threat overview for CVE-2021-20220

Top countries where our scanners detected CVE-2021-20220

Top open port discovered on systems with this issue 80

IPs affected by CVE-2021-20220 6,019

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2021-20220!

^*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-2021-20220

EPSS FAQ

0.31%

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

~ 51 %

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

CVSS scores for CVE-2021-20220

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:P/A:N	8.6	4.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: None
4.8	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N	2.2	2.5	NIST
Attack Vector: Network Attack Complexity: High Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2021-20220

CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.
Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)

References for CVE-2021-20220

https://security.netapp.com/advisory/ntap-20220210-0013/

CVE-2021-20220 Undertow Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1923133

1923133 – (CVE-2021-20220) CVE-2021-20220 undertow: Possible regression in fix for CVE-2020-10687
Issue Tracking;Vendor Advisory