PT-2023-7318 · Nginx · Nginx Njs

Ret2Ddmeo · Published 2023-04-09 · Updated 2023-05-26 · CVE-2023-27730

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 in the njs lvlhsh find function at src/njs lvlhsh.c and a memory reading issue in the js vmcode return function at src/njs vmcode.c. This could allow a remote attacker to cause a denial of service.

Recommendations For Nginx NJS version 0.7.10, consider disabling the njs lvlhsh find and js vmcode return functions as a temporary workaround until a patch is available. Restrict access to the affected njs lvlhsh.c and njs vmcode.c files 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:2023-08348

CVE-2023-27730

Affected Products

Nginx Njs

References · 8

• 🔥 https://github.com/nginx/njs/issues/615 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2023-27730 · Security Note
• https://bdu.fstec.ru/vul/2023-08348 · Security Note
• https://osv.dev/vulnerability/CVE-2023-27730 · Vendor Advisory
• https://github.com/nginx/njs/commit/9cec874582b925e373adb0896b85a112702f6664 · Note
• https://t.me/cibsecurity/61728 · Telegram Post
• https://security.snyk.io/vuln/SNYK-UNMANAGED-NGINXNJS-5416712 · Note
• https://t.me/cvenotify/47851 · Telegram Post