Multiple vulnerabilities in Golang Go

Published: 2021-03-15

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-27919 CVE-2021-27918
CWE-ID	CWE-20 CWE-835
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Go programming language Universal components / Libraries / Scripting languages
Vendor	Google

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU51485

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-2021-27919

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in the Reader.Open API when use a ZIP archive containing files start with “../”. A remote attacker can trick a victim to open a specially crafted ZIP archive and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Go programming language: 1.16.0

External links

http://groups.google.com/g/golang-announce/c/MfiLYjG-RAw

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.

2) Infinite loop

EUVDB-ID: #VU51486