Multiple vulnerabilities in Node.js

Published: 2021-07-08 | Updated: 2022-09-05

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-27290 CVE-2021-22918
CWE-ID	CWE-185 CWE-125
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Node.js ssri Client/Desktop applications / Software for system administration Node.js Server applications / Web servers
Vendor	Node.js Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

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

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.

2) Out-of-bounds read

EUVDB-ID: #VU54624

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-22918

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in uv__idna_toascii() function in libuv, which is used to convert strings to ASCII. A remote attacker can force the application to resolve a specially crafted hostname, trigger an out-of-bounds read error and gain access to sensitive information or perform a denial of service (DoS) attack.