Improper Enforcement of Message or Data Structure Affecting libnghttp2 package, versions <0:1.33.0-3.el8_2.1
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Test your applications- Snyk ID SNYK-ORACLE8-LIBNGHTTP2-2559416
- published 10 Apr 2022
- disclosed 3 Jun 2020
Introduced: 3 Jun 2020
CVE-2020-11080 Open this link in a new tabHow to fix?
Upgrade Oracle:8 libnghttp2 to version 0:1.33.0-3.el8_2.1 or higher.
This issue was patched in ELSA-2020-2755.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libnghttp2 package and not the libnghttp2 package as distributed by Oracle.
See How to fix? for Oracle:8 relevant fixed versions and status.
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.
References
- https://linux.oracle.com/cve/CVE-2020-11080.html
- https://linux.oracle.com/errata/ELSA-2020-2755.html
- https://linux.oracle.com/errata/ELSA-2020-2848.html
- https://linux.oracle.com/errata/ELSA-2020-2852.html
- https://linux.oracle.com/errata/ELSA-2020-5765.html
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.html
- https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090
- https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394
- https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr
- https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/
- https://www.debian.org/security/2020/dsa-4696
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://lists.debian.org/debian-lts-announce/2023/10/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/