Vulnerability identifier: #VU50957

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-27813

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
websocket
Universal components / Libraries / Libraries used by multiple products

Vendor: gorilla

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to integer overflow when processing frames received via a websocket connection. A remote attacker can pass specially crafted data to the application, trigger integer overflow and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

websocket: 1.4.0

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1902111
http://github.com/gorilla/websocket/security/advisories/GHSA-jf24-p9p9-4rjh
http://lists.debian.org/debian-lts-announce/2021/01/msg00008.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.