PT-2023-7316 · Nginx · Nginx Njs

Ret2Ddmeo · Published 2023-04-09 · Updated 2025-02-11 · CVE-2023-27728

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Nginx NJS version 0.7.10

Description The issue is related to a segmentation violation via the function njs dump is recursive at src/njs vmcode.c. This is caused by a memory boundary read issue in the njs dump is recursive function of the Nginx NJS interpreter. Exploitation of this issue may allow a remote attacker to cause a denial of service.

Recommendations For Nginx NJS version 0.7.10, consider disabling the njs dump is recursive function as a temporary workaround until a patch is available. Restrict access to the njs vmcode.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

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2023-08346

CVE-2023-27728

Affected Products

Nginx Njs

References · 9

• 🔥 https://github.com/nginx/njs/issues/618 · Exploit
• https://bdu.fstec.ru/vul/2023-08346 · Security Note
• https://osv.dev/vulnerability/CVE-2023-27728 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-27728 · Security Note
• https://github.com/nginx/njs/commit/1f54b79cabd1d112624ebba4d0a5f07cb3f70e95 · Note
• https://t.me/cvenotify/47853 · Telegram Post
• https://t.me/cibsecurity/61730 · Telegram Post
• https://security.snyk.io/vuln/SNYK-UNMANAGED-NGINXNJS-5416710 · Note
• https://t.me/cvenotify/110931 · Telegram Post