#VU55579 Resource exhaustion in JSZip - CVE-2021-23413

Vulnerability identifier: #VU55579

Vulnerability risk: Medium

CVSSv4.0: 5.5 [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:P/U:Green]

CVE-ID: CVE-2021-23413

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
JSZip
Web applications / JS libraries

Vendor: Stuart Knightley

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. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

JSZip: 1.0.0 - 3.6.0

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External links
https://github.com/Stuk/jszip/pull/766
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1251498
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1251499
https://github.com/Stuk/jszip/commit/22357494f424178cb416cdb7d93b26dd4f824b36
https://github.com/Stuk/jszip/blob/master/lib/object.js%23L88
https://snyk.io/vuln/SNYK-JS-JSZIP-1251497
https://github.com/advisories/GHSA-jg8v-48h5-wgxg
https://www.npmjs.com/advisories/1774

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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. However, proof of concept for this vulnerability is available.