#VU51486 Infinite loop in Go programming language

Published: 2021-03-15

Vulnerability identifier: #VU51486

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-27918


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Go programming language
Universal components / Libraries / Scripting languages

Vendor: Google


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

The vulnerability exists due to infinite loop when using xml.NewTokenDecoder with a custom TokenReader. A remote attacker can trick a victim to open a specially crafted XML content and cause denial of service conditions.

Install updates from vendor's website.

Vulnerable software versions

Go programming language: 1.15 - 1.15.8, 1.16.0

External links

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.

Latest bulletins with this vulnerability