PT-2022-15063 · Next.Js · Next.Js

Ijjk + 1 · CVE-2022-21721 · Published 2022-01-28 · Updated 2023-07-24

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Next.js versions 12.0.0 through 12.0.8

Description The issue allows a bad actor to trigger a denial of service attack for anyone using i18n functionality. To be affected, one must use next start or a custom server and the built-in i18n support. Deployments on Vercel, along with similar environments where invalid requests are filtered before reaching Next.js, are not affected.

Recommendations For Next.js versions 12.0.0 through 12.0.8, upgrade to next@12.0.9 to mitigate the issue. As a temporary workaround, ensure /${locale}/ next/ is blocked from reaching the Next.js instance until it becomes feasible to upgrade.

Exploit

Fix

RCE

Resource Exhaustion

Weakness Enumeration

CWE-20

CWE-400

Related Identifiers

CVE-2022-21721

GHSA-WR66-VRWM-5G5X

Affected Products

Next.Js

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21721.json · Exploit
• https://github.com/vercel/next.js/pull/33503 · Patch
• https://osv.dev/vulnerability/CVE-2022-21721 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-21721 · Security Note
• https://osv.dev/vulnerability/GHSA-wr66-vrwm-5g5x · Vendor Advisory
• https://github.com/vercel/next.js · Note
• https://github.com/vercel/next.js/security/advisories/GHSA-wr66-vrwm-5g5x · Note
• https://github.com/vercel/next.js/releases/tag/v12.0.9 · Note
• https://t.me/cvenotify/26002 · Telegram Post
• https://t.me/cvenotify/26008 · Telegram Post
• https://t.me/cvenotify/55031 · Telegram Post