#VU56405 Resource exhaustion in passport-saml - CVE-2021-39171

Vulnerability identifier: #VU56405

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-2021-39171

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
passport-saml
Web applications / Modules and components for CMS

Vendor: Node SAML Organization

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

passport-saml: 0.0.3 - 3.0.0

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External links
https://github.com/node-saml/passport-saml/security/advisories/GHSA-5379-r78w-42h2
https://github.com/node-saml/passport-saml/pull/595

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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.