VDB
CVE-2021-20220
CVE-2021-20220
PUBLISHED
CVSS 4.800000190734863 MEDIUM
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.
EPSS 1.12% · 63.8th percentile
Risk Scores
CVSS 3.1
4.800000190734863
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS Score
1.12%
63.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:25.10 | undertow | 0, 2.3.18-2, 2.3.18-1 |
| Ubuntu:18.04:LTS | undertow | 1.4.22-1, 1.4.23-2build1, 1.4.23-3 |
| Ubuntu:24.04:LTS | undertow | 2.3.8-2, 0 |
| Ubuntu:20.04:LTS | undertow | 2.0.23-1, 2.0.27-1, 2.0.28-1 |
| Ubuntu:22.04:LTS | undertow | 2.2.13-1, 2.2.8-1, 2.2.14-1 |
| Ubuntu:16.04:LTS | undertow | 0, 1.3.4-1, 1.3.5-1 |
Timeline
- Feb 23, 2021 CVE Published
- Feb 23, 2021 PoC Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Dec 28, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 22, 2022 CVE Updated
- Mar 1, 2022 EPSS Score
- May 2, 2022 EPSS Score
- Jul 4, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20220 third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1923133 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20220 third-party-advisory