CVE-2020-27782
HIGH7.5EPSS 0.18%Denial of service in Undertow
Published: 2/9/2022Modified: 4/28/2026
Also known as:DEBIAN-CVE-2020-27782
Description
A flaw was found in the Undertow AJP connector. Malicious requests and abrupt connection closes could be triggered by an attacker using query strings with non-RFC compliant characters resulting in a denial of service. The highest threat from this vulnerability is to system availability. This affects Undertow 2.1.5.SP1, 2.0.33.SP2, and 2.2.3.SP1.
Affected packages (2)
- Debian/undertowfrom 0, < 2.2.4-1
- Maven/io.undertow:undertow-core>= 2.1.0, < 2.1.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-27782
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-27782
- WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=1901304
- WEBhttps://github.com/undertow-io/undertow/pull/997/commits/98a9ab7f2d7fe7a7254eaf17d47816c452169c90
- WEBhttps://issues.redhat.com/browse/UNDERTOW-1813