PT-2022-3707 · Nginx · Nginx Njs

Dramthy · Published 2022-07-18 · Updated 2022-07-25 · CVE-2022-34028

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Nginx NJS version 0.7.5

Description The issue is related to a segmentation violation via the njs utf8 next function at src/njs utf8.h. This can lead to a buffer overflow in memory, potentially allowing a remote attacker to execute arbitrary code.

Recommendations For Nginx NJS version 0.7.5, consider disabling the njs utf8 next function as a temporary workaround until a patch is available. Restrict access to the src/njs utf8.h module to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

BDU:2022-04495

CVE-2022-34028

Affected Products

Nginx Njs

References · 7

• 🔥 https://github.com/nginx/njs/issues/522 · Exploit
• https://bdu.fstec.ru/vul/2022-04495 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-34028 · Security Note
• https://osv.dev/vulnerability/CVE-2022-34028 · Vendor Advisory
• https://github.com/nginx/njs/commit/36f04a3178fcb6da8513cc3dbf35215c2a581b3f · Note
• https://t.me/cibsecurity/46510 · Telegram Post
• https://vuldb.com/ru/?id.204147 · Note