CVE - CVE-2020-11080

CVE-ID
CVE-2020-11080	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr URL:https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr DEBIAN:DSA-4696 URL:https://www.debian.org/security/2020/dsa-4696 FEDORA:FEDORA-2020-43d5a372fc URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/ FEDORA:FEDORA-2020-f7d15c8b77 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/ MISC:https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090 URL:https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090 MISC:https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394 URL:https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394 MISC:https://www.oracle.com/security-alerts/cpujan2021.html URL:https://www.oracle.com/security-alerts/cpujan2021.html MISC:https://www.oracle.com/security-alerts/cpujul2020.html URL:https://www.oracle.com/security-alerts/cpujul2020.html MISC:https://www.oracle.com/security-alerts/cpuoct2020.html URL:https://www.oracle.com/security-alerts/cpuoct2020.html SUSE:openSUSE-SU-2020:0802 URL:http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.html
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20200330	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20200330)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is a record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)