High severity · published Feb 23, 2021
CVE-2020-27782
A flaw was found in the Undertow AJP connector
7.5
CVSS
1.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JF
Jboss Fuse · Redhat
6.0.0; 7.0.0 · source: NVD
OA
Openshift Application Runtimes · Redhat
All versions, or not specified · source: NVD
UN
Undertow · Redhat
2.0.33; 2.1.5; 2.2.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27782
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27782
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1901304
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