CVE-2020-11080

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 v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394	Patch Third Party Advisory
https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr	Patch Third Party Advisory
https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090	Patch Third Party Advisory
https://www.debian.org/security/2020/dsa-4696	Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00024.html	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/	Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2020.html	Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2020.html	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/	Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.html	Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.html	Not Applicable Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html	Mailing List Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*

Configuration 3 (hide)

cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

Configuration 4 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:31:::::::*
	cpe:2.3:o:fedoraproject:fedora:33:::::::*

Configuration 5 (hide)

OR	cpe:2.3:a:oracle:enterprise_communications_broker:3.1.0:::::::*
	cpe:2.3:a:oracle:graalvm:19.3.2::::enterprise:::
	cpe:2.3:a:oracle:graalvm:20.1.0::::enterprise:::
	cpe:2.3:a:oracle:mysql::::::::
	cpe:2.3:a:oracle:enterprise_communications_broker:3.2.0:::::::*
	cpe:2.3:a:oracle:mysql::::::::
	cpe:2.3:a:oracle:mysql::::::::
	cpe:2.3:a:oracle:mysql::::::::
	cpe:2.3:a:oracle:mysql::::::::
	cpe:2.3:a:oracle:banking_extensibility_workbench:14.4.0:::::::*
	cpe:2.3:a:oracle:banking_extensibility_workbench:14.3.0:::::::*
	cpe:2.3:a:oracle:blockchain_platform::::::::

Configuration 6 (hide)

OR	cpe:2.3:a:nodejs:node.js:::::-:::*
	cpe:2.3:a:nodejs:node.js:::::lts:::*
	cpe:2.3:a:nodejs:node.js:::::-:::*
	cpe:2.3:a:nodejs:node.js:::::-:::*
	cpe:2.3:a:nodejs:node.js:::::lts:::*

Information

Published : 2020-06-03 16:15

Updated : 2022-08-29 13:41

NVD link : CVE-2020-11080

Mitre link : CVE-2020-11080

JSON object : View

CWE

CWE-707

Improper Neutralization

Products Affected

oracle

enterprise_communications_broker
mysql
graalvm
blockchain_platform
banking_extensibility_workbench

nodejs

node.js

nghttp2

nghttp2

fedoraproject

fedora

opensuse

leap

debian

debian_linux

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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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-707"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2020-11080", "ASSIGNER": "security-advisories@github.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 2.9, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}}, "publishedDate": "2020-06-03T23:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "1.41.0"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:oracle:enterprise_communications_broker:3.1.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:oracle:graalvm:19.3.2:*:*:*:enterprise:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:oracle:graalvm:20.1.0:*:*:*:enterprise:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "8.0.21", "versionStartIncluding": "8.0.0"}, {"cpe23Uri": "cpe:2.3:a:oracle:enterprise_communications_broker:3.2.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "7.6.15", "versionStartIncluding": "7.6.0"}, {"cpe23Uri": "cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "7.5.19", "versionStartIncluding": "7.5.0"}, {"cpe23Uri": "cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "7.4.29", "versionStartIncluding": "7.4.0"}, {"cpe23Uri": "cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "7.3.30", "versionStartIncluding": "7.3.0"}, {"cpe23Uri": "cpe:2.3:a:oracle:banking_extensibility_workbench:14.4.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:oracle:banking_extensibility_workbench:14.3.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:oracle:blockchain_platform:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "21.1.2"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "10.12.0", "versionStartIncluding": "10.0.0"}, {"cpe23Uri": "cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "10.21.0", "versionStartIncluding": "10.13.0"}, {"cpe23Uri": "cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "12.12.0", "versionStartIncluding": "12.0.0"}, {"cpe23Uri": "cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "14.4.0", "versionStartIncluding": "14.0.0"}, {"cpe23Uri": "cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "12.18.0", "versionStartIncluding": "12.13.0"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-08-29T20:41Z"}

7.5 /10

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0 /10

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

JSON object

Attach tags to CVE-2020-11080

7.5^/10

5.0^/10

Attach tags to `CVE-2020-11080`