Medium severity · published Feb 23, 2021
CVE-2021-20220
A flaw was found in Undertow
4.8
CVSS
1.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AI
Active IQ Unified Manager · Netapp
All versions, or not specified · source: NVD
OW
Oncommand Workflow Automation · Netapp
All versions, or not specified · source: NVD
UN
Undertow · Redhat
before 2.0.34; 2.1.0 before 2.1.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20220
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20220
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1923133
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220210-0013/
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