Vulnerability identifier: #VU52194

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-27290

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Node.js ssri
Client/Desktop applications / Software for system administration

Vendor: Node.js Foundation

Description

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

The vulnerability exists due to incorrect processing of SRIs. A remote attacker can pass specially crafted input to the application and perform regular expression denial of service (ReDoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Node.js ssri: 5.2.2 - 5.2.4, 5.3.0, 6.0.0 - 6.0.1, 7.0.0 - 7.0.1, 7.1.0, 8.0.0

---

External links
http://doyensec.com/resources/Doyensec_Advisory_ssri_redos.pdf
http://github.com/yetingli/SaveResults/blob/main/pdf/ssri-redos.pdf
http://npmjs.com

---

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.