Regular Expression Denial of Service (ReDoS) in ssri

1) Incorrect Regular Expression

EUVDB-ID: #VU52194

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-2021-27290

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

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 - 8.0.0

CPE2.3

• cpe:2.3:a:node_js_foundation:nodejs_ssri:5.2.4:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs_ssri:5.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs_ssri:6.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs_ssri:7.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs_ssri:7.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs_ssri:8.0.0:*:*:*:*:*:*:*

External links

https://doyensec.com/resources/Doyensec_Advisory_ssri_redos.pdf
https://github.com/yetingli/SaveResults/blob/main/pdf/ssri-redos.pdf
https://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.