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Mend.io Vulnerability Database

CVE-2020-11080

Date: June 2, 2020

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.

Language: C

Severity Score

3.7

Related Resources (22)

Url: https://nvd.nist.gov/vuln/detail/CVE-2020-11080

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/

Url: https://access.redhat.com/security/cve/CVE-2020-11080

Url: https://security.alpinelinux.org/vuln/CVE-2020-11080

Url: https://www.oracle.com/security-alerts/cpuoct2020.html

Url: https://lists.debian.org/debian-lts-announce/2023/10/msg00023.html

Url: https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090

Url: https://www.debian.org/security/2020/dsa-4696

Url: https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394

Url: https://www.oracle.com/security-alerts/cpujan2021.html

Url: https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/

Url: https://security-tracker.debian.org/tracker/CVE-2020-11080

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2020-11080

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/

Url: https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr

Url: https://www.oracle.com/security-alerts/cpujul2020.html

Url: https://www.oracle.com//security-alerts/cpujul2021.html

Url: https://www.oracle.com/security-alerts/cpuapr2022.html

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/

Url: http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.html

Url: https://www.mend.io/vulnerability-database/CVE-2020-11080

Severity Score

3.7

Weakness Type (CWE)

Improper Neutralization

CWE-707

Uncontrolled Resource Consumption

CWE-400

CVSS v3.1

Base Score:	3.7
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	HIGH
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	LOW

CVSS v2

Base Score:	5.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	PARTIAL
Additional information:

Mend.io Vulnerability Database

We found results for “”

CVE-2020-11080

Date: June 2, 2020

Language: C

Severity Score

Related Resources (22)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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