PT-2022-2375 · Nginx · Nginx Njs

Q1Iq · Published 2022-02-15 · Updated 2022-09-09 · CVE-2022-27008

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 0.7.2

Description The issue is related to a Buffer Overflow in the Array.prototype.concat() function of the njs interpreter in the nginx server. This occurs when a slow array appended element is a fast array, leading to a type confusion. The exploitation of this issue can allow a remote attacker to cause a denial of service.

Recommendations For nginx njs version 0.7.2, consider disabling the Array.prototype.concat() function as a temporary workaround until a patch is available. Restrict access to the njs interpreter 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

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2022-02727

CVE-2022-27008

Affected Products

Nginx Njs

References · 9

• 🔥 https://github.com/nginx/njs/issues/471 · Exploit
• https://github.com/nginx/njs/commit/e673ae41a998d1391bd562edb2ed6d49db7cc716 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-27008 · Security Note
• https://osv.dev/vulnerability/CVE-2022-27008 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-02727 · Security Note
• https://t.me/cibsecurity/40776 · Telegram Post
• https://security.netapp.com/advisory/ntap-20220519-0008 · Note
• https://t.me/cvenotify/29272 · Telegram Post
• https://t.me/cvenotify/30468 · Telegram Post