CVE & CISA-KEV CatalogNVD
CVE-2020-27782
HIGH7.5
CVSS v3
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.
How to fix
Remediation Available
undertowDebian
Fixed in:2.2.4-1CVE-2020-27782
eap7-glassfish-elRocky
Fixed in:0:3.0.1-4.b08_redhat_00005.1.ep7.el7RHSA-2025:9582
Fixed in:0:3.0.1-4.b08_redhat_00005.1.ep7.el7RHSA-2025:9582
eap7-glassfish-elRed Hat / RHEL
Fixed in:0:3.0.1-4.b08_redhat_00005.1.ep7.el7RHSA-2025:9582
Fixed in:0:3.0.1-4.b08_redhat_00005.1.ep7.el7RHSA-2025:9582
eap7-glassfish-el-implRed Hat / RHEL
Fixed in:0:3.0.1-4.b08_redhat_00005.1.ep7.el7RHSA-2025:9582
eap7-glassfish-el-implRocky
Fixed in:0:3.0.1-4.b08_redhat_00005.1.ep7.el7RHSA-2025:9582
eap7-hibernateRocky
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernateRed Hat / RHEL
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernate-coreRed Hat / RHEL
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernate-coreRocky
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernate-entitymanagerRocky
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernate-entitymanagerRed Hat / RHEL
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernate-enversRocky
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernate-enversRed Hat / RHEL
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernate-infinispanRocky
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernate-infinispanRed Hat / RHEL
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernate-java8Rocky
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-hibernate-java8Red Hat / RHEL
Fixed in:0:5.1.17-3.Final_redhat_00004.1.ep7.el7RHSA-2025:9582
eap7-jackson-databindRocky
Fixed in:0:2.8.11.6-3.SP1_redhat_00003.1.ep7.el7RHSA-2025:9582
Fixed in:0:2.8.11.6-3.SP1_redhat_00003.1.ep7.el7RHSA-2025:9582
eap7-jackson-databindRed Hat / RHEL
Fixed in:0:2.8.11.6-3.SP1_redhat_00003.1.ep7.el7RHSA-2025:9582
Fixed in:0:2.8.11.6-3.SP1_redhat_00003.1.ep7.el7RHSA-2025:9582
eap7-jboss-ejb-clientRocky
Fixed in:0:4.0.12-1.Final_redhat_00002.1.ep7.el7RHSA-2025:9582
Fixed in:0:4.0.12-1.Final_redhat_00002.1.ep7.el7RHSA-2025:9582
eap7-jboss-ejb-clientRed Hat / RHEL
Fixed in:0:4.0.12-1.Final_redhat_00002.1.ep7.el7RHSA-2025:9582
Fixed in:0:4.0.12-1.Final_redhat_00002.1.ep7.el7RHSA-2025:9582
eap7-nettyRocky
Fixed in:0:4.1.63-2.Final_redhat_00003.1.ep7.el7RHSA-2025:9582
Fixed in:0:4.1.63-2.Final_redhat_00003.1.ep7.el7RHSA-2025:9582
eap7-nettyRed Hat / RHEL
Fixed in:0:4.1.63-2.Final_redhat_00003.1.ep7.el7RHSA-2025:9582
Fixed in:0:4.1.63-2.Final_redhat_00003.1.ep7.el7RHSA-2025:9582
eap7-netty-allRed Hat / RHEL
Fixed in:0:4.1.63-2.Final_redhat_00003.1.ep7.el7RHSA-2025:9582
eap7-netty-allRocky
Fixed in:0:4.1.63-2.Final_redhat_00003.1.ep7.el7RHSA-2025:9582
eap7-undertowRed Hat / RHEL
Fixed in:0:1.4.18-16.SP14_redhat_00001.1.ep7.el7RHSA-2025:9582
Fixed in:0:1.4.18-16.SP14_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-undertowRocky
Fixed in:0:1.4.18-16.SP14_redhat_00001.1.ep7.el7RHSA-2025:9582
Fixed in:0:1.4.18-16.SP14_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildflyRed Hat / RHEL
Fixed in:0:7.1.11-4.GA_redhat_00002.1.ep7.el7RHSA-2025:9582
Fixed in:0:7.1.11-4.GA_redhat_00002.1.ep7.el7RHSA-2025:9582
eap7-wildflyRocky
Fixed in:0:7.1.11-4.GA_redhat_00002.1.ep7.el7RHSA-2025:9582
Fixed in:0:7.1.11-4.GA_redhat_00002.1.ep7.el7RHSA-2025:9582
eap7-wildfly-elytronRocky
Fixed in:0:1.1.14-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
Fixed in:0:1.1.14-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-elytronRed Hat / RHEL
Fixed in:0:1.1.14-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
Fixed in:0:1.1.14-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-http-clientRed Hat / RHEL
Fixed in:0:1.0.21-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-http-clientRocky
Fixed in:0:1.0.21-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-http-client-commonRocky
Fixed in:0:1.0.21-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-http-client-commonRed Hat / RHEL
Fixed in:0:1.0.21-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-http-ejb-clientRocky
Fixed in:0:1.0.21-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-http-ejb-clientRed Hat / RHEL
Fixed in:0:1.0.21-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-http-naming-clientRed Hat / RHEL
Fixed in:0:1.0.21-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-http-naming-clientRocky
Fixed in:0:1.0.21-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-http-transaction-clientRed Hat / RHEL
Fixed in:0:1.0.21-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-http-transaction-clientRocky
Fixed in:0:1.0.21-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-modulesRocky
Fixed in:0:7.1.11-4.GA_redhat_00002.1.ep7.el7RHSA-2025:9582
eap7-wildfly-modulesRed Hat / RHEL
Fixed in:0:7.1.11-4.GA_redhat_00002.1.ep7.el7RHSA-2025:9582
eap7-wildfly-naming-clientRocky
Fixed in:0:1.0.13-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
Fixed in:0:1.0.13-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-naming-clientRed Hat / RHEL
Fixed in:0:1.0.13-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
Fixed in:0:1.0.13-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-opensslRed Hat / RHEL
Fixed in:0:1.0.12-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
Fixed in:0:1.0.12-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-opensslRocky
Fixed in:0:1.0.12-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
Fixed in:0:1.0.12-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-openssl-javaRed Hat / RHEL
Fixed in:0:1.0.12-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-openssl-javaRocky
Fixed in:0:1.0.12-1.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-openssl-linuxRocky
Fixed in:0:1.0.12-6.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
Fixed in:0:1.0.12-6.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-openssl-linuxRed Hat / RHEL
Fixed in:0:1.0.12-6.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
Fixed in:0:1.0.12-6.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-openssl-linux-debuginfoRed Hat / RHEL
Fixed in:0:1.0.12-6.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
eap7-wildfly-openssl-linux-debuginfoRocky
Fixed in:0:1.0.12-6.Final_redhat_00001.1.ep7.el7RHSA-2025:9582
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploit Intelligence
1.27%probability of exploitation in 30 days
66thpercentile
Moderate risk: more likely to be exploited than 66% of all known CVEs.
References
Vendor Advisory1
Related Vulnerabilities
Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-44487 | High | 7.5 | 100% | KEV | Fix |
| CVE-2021-44228 | Critical | 10.0 | 100% | KEV + Ransom | Fix |
| CVE-2011-3192 | High | 7.8 | 99% | - | Fix |
| CVE-2019-11478 | Medium | 5.3 | 95% | - | Fix |
| CVE-2024-25617 | Medium | 5.3 | 89% | - | Fix |
| CVE-2018-1000115 | High | 7.5 | 89% | - | Fix |
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.