#VU68779 Improper Validation of Array Index in Go Text - CVE-2020-28851

Vulnerability identifier: #VU68779

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-28851, CVE-2020-28852

CWE-ID: CWE-129

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Go Text
Universal components / Libraries / Libraries used by multiple products

Vendor: Go

Description

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

The vulnerability exists due to improper validation of array index in language.ParseAcceptLanguage while processing a BCP 47 tag. A remote attacker can send a specially crafted HTTP request containing a malformed HTTP Accept-Language header and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Go Text: 0.1.0 - 0.3.5

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External links
https://github.com/golang/go/issues/42536
https://security.netapp.com/advisory/ntap-20210212-0004/
https://github.com/golang/go/issues/42535

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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.