VDB
RHSA-2020%3A5173
RHSA-2020%3A5173
PUBLISHED
CVSS 7.5 HIGH
A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat JBoss Web Server 5 |
Timeline
- Nov 23, 2020 CVE Published
- May 1, 2026 Distribution Patch
- May 1, 2026 Distribution Patch
- May 1, 2026 Security Advisory
- May 1, 2026 Security Advisory
- May 14, 2026 CVE Updated
References
- https://access.redhat.com/errata/RHSA-2020:5173 advisory
- https://access.redhat.com/security/updates/classification/#moderate advisory
- https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=webserver&downloadType=distributions&version=5.4 advisory
- https://access.redhat.com/documentation/en-US/Red_Hat_JBoss_Web_Server/5.4 advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1851420 issue
- https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_5173.json advisory
- https://access.redhat.com/security/cve/CVE-2020-11996 advisory
- https://www.cve.org/CVERecord?id=CVE-2020-11996 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2020-11996 advisory
- http://mail-archives.apache.org/mod_mbox/tomcat-announce/202006.mbox/%3Cfd56bc1d-1219-605b-99c7-946bf7bd8ad4%40apache.org%3E advisory
- http://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.0-M6 advisory
- http://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.56 advisory
- http://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.36 advisory