PT-2022-4328 · Nginx · Nginx Njs

Q1Iq · Published 2022-05-23 · Updated 2022-06-29 · CVE-2022-31306

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Nginx NJS version 0.7.2

Description The issue is related to the function njs array convert to slow array at src/njs array.c in the Nginx NJS interpreter, which can lead to uncontrolled resource consumption. This can potentially allow a remote attacker to elevate their privileges. The problem is caused by a segmentation violation in the mentioned function.

Recommendations For Nginx NJS version 0.7.2, consider disabling the njs array convert to slow array function as a temporary workaround until a patch is available. Restrict access to the njs array.c module to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Resource Exhaustion

Use After Free

Weakness Enumeration

CWE-400

CWE-416

Related Identifiers

BDU:2022-05186

CVE-2022-31306

Affected Products

Nginx Njs

References · 8

• 🔥 https://github.com/nginx/njs/issues/481 · Exploit
• https://github.com/nginx/njs/commit/81af26364c21c196dd21fb5e14c7fa9ce7debd17 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-31306 · Security Note
• https://osv.dev/vulnerability/CVE-2022-31306 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-05186 · Security Note
• https://t.me/cibsecurity/44880 · Telegram Post
• https://t.me/cvenotify/32340 · Telegram Post
• https://vuldb.com/ru/?id.202444 · Note