CVE-2020-11080
In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 5.32% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-707, CWE-400
- Affected
- nghttp2/nghttp2 · debian/debian linux · opensuse/leap · fedoraproject/fedora · oracle/banking extensibility workbench · oracle/blockchain platform · oracle/enterprise communications broker · oracle/graalvm · oracle/mysql · nodejs/node.js
- Source
- security-advisories@github.com
References
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.htmlMailing List, Third Party Advisory
- https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090Patch, Third Party Advisory
- https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394Patch, Third Party Advisory
- https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xrPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00011.htmlMailing List, Third Party Advisory
- 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/
- https://www.debian.org/security/2020/dsa-4696Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlNot Applicable, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third 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 List, Third Party Advisory
- https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090Patch, Third Party Advisory
- https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394Patch, Third Party Advisory
- https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xrPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00011.htmlMailing List, Third Party Advisory
- 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/
- https://www.debian.org/security/2020/dsa-4696Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlNot Applicable, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.