#VU65693 Infinite loop in Go Net - CVE-2021-33194

Vulnerability identifier: #VU65693

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-33194

CWE-ID: CWE-835

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Go Net
Web applications / Modules and components for CMS

Vendor: Go

Description

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

The vulnerability exists due to infinite loop. A remote attacker can pass crafted ParseFragment  input to the application, consume all available system resources and cause denial of service conditions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Go Net: before 0.0.0-20210520170846-37e1c6afe023

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External links
https://groups.google.com/g/golang-announce/c/wPunbCPkWUg
https://github.com/golang/net/commit/37e1c6afe02340126705deced573a85ab75209d7
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4CHKSFMHZVOBCZSSVRE3UEYNKARTBMTM/

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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.