Vulnerability Description
In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nghttp2 | Nghttp2 | < 1.41.0 |
| Debian | Debian Linux | 9.0 |
| Opensuse | Leap | 15.1 |
| Fedoraproject | Fedora | 31 |
| Oracle | Banking Extensibility Workbench | 14.3.0 |
| Oracle | Blockchain Platform | < 21.1.2 |
| Oracle | Enterprise Communications Broker | 3.1.0 |
| Oracle | Graalvm | 19.3.2 |
| Oracle | Mysql | >= 7.3.0, <= 7.3.30 |
| Nodejs | Node.Js | >= 10.0.0, <= 10.12.0 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.htmlMailing ListThird Party Advisory
- https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f750PatchThird Party Advisory
- https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af3PatchThird Party Advisory
- https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xrPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00011.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.debian.org/security/2020/dsa-4696Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlNot ApplicableThird Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.htmlThird Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.htmlThird Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2020.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2020-11080?
CVE-2020-11080 is a vulnerability with a CVSS score of 3.7 (LOW). In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a ...
How severe is CVE-2020-11080?
CVE-2020-11080 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-11080?
Check the references section above for vendor advisories and patch information. Affected products include: Nghttp2 Nghttp2, Debian Debian Linux, Opensuse Leap, Fedoraproject Fedora, Oracle Banking Extensibility Workbench.