PT-2023-7317 · Nginx · Nginx Njs

Ret2Ddmeo · Published 2023-04-09 · Updated 2023-05-26 · CVE-2023-27729

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 an illegal memcpy via the function njs vmcode return at src/njs vmcode.c in the Nginx NJS interpreter. This can lead to a buffer overflow in memory. 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 vmcode return function as a temporary workaround until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

BDU:2023-08347

CVE-2023-27729

Affected Products

Nginx Njs

References · 9

• https://github.com/nginx/njs/issues/619 · Patch
• https://bdu.fstec.ru/vul/2023-08347 · Security Note
• https://osv.dev/vulnerability/CVE-2023-27729 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-27729 · Security Note
• https://github.com/nginx/njs/commit/455f6d4f0447a60329c21928d67f61c79ac3b243 · Note
• https://t.me/cvenotify/47852 · Telegram Post
• https://vuldb.com/ru/?id.225369 · Note
• https://t.me/cibsecurity/61734 · Telegram Post
• https://security.snyk.io/vuln/SNYK-UNMANAGED-NGINXNJS-5416711 · Note