CVE-2020-27813
mediumpriority · track · 31EPSS 0.022 · 82 %ileDEEUUSEPSS · scored 2026-10-27
An integer overflow vulnerability exists with the length of websocket frames received via a websocket connection. An attacker would use this flaw to cause a denial of service attack on an HTTP Server allowing websocket connections.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (10)
Products and version ranges known to be affected.
advisories (3)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2022-0510IBM DB2: Mehrere SchwachstellenDeutsch2022-06-29csaf · cert_bundDE
Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in IBM DB2 ausnutzen, um Dateien zu manipulieren, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand auszulösen, willkürlichen Code mit erhöhten Rechten auszuführen, Informationen falsch darzustellen und beliebigen Code auszuführen.
- GHSA-3xh2-74w9-5vxmInteger overflow in github.com/gorilla/websocket2021-05-18ghsa · osvUS
An integer overflow vulnerability exists with the length of websocket frames received via a websocket connection. An attacker would use this flaw to cause a denial of service attack on an HTTP Server allowing websocket connections.
- GO-2020-0019Integer overflow in github.com/gorilla/websocket2021-04-14vendor · osvUS
An attacker can craft malicious WebSocket frames that cause an integer overflow in a variable which tracks the number of bytes remaining. This may cause the server or client to get stuck attempting to read frames in a loop, which can be used as a denial of service vector.
also known as (6)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (24)
External citations — patches, advisories, analysis.
- https://bugzilla.redhat.com/show_bug.cgi?id=1902111cnnvd
- https://github.com/gorilla/websocket/security/advisories/GHSA-jf24-p9p9-4rjhcnnvd
- https://lists.debian.org/debian-lts-announce/2021/01/msg00008.htmlcnnvd
- https://lists.debian.org/debian-lts-announce/2023/05/msg00012.htmlcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-27813cnnvd
- https://packetstormsecurity.com/files/161549/Red-Hat-Security-Advisory-2021-0100-01.htmlcnnvd
- https://packetstormsecurity.com/files/162759/Red-Hat-Security-Advisory-2021-1561-01.htmlcnnvd
- https://vigilance.fr/vulnerability/gorilla-websocket-denial-of-service-34251cnnvd
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