#VU54521 Resource exhaustion in Go programming language - CVE-2021-33196

Vulnerability identifier: #VU54521

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-2021-33196

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

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

Vendor: Google

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when parsing archives. A remote attacker can pass a specially crafted .zip file to the application, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Go programming language: 1.15 - 1.16.4

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1965503
https://github.com/golang/go/issues/46242
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33912
https://go-review.googlesource.com/c/go/+/322949/
https://go-review.googlesource.com/c/go/+/322909/
https://go-review.googlesource.com/c/go/+/318909/

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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.