PT-2021-15456 · Printf · Printf

Yeting Li · Published 2021-03-12 · Updated 2023-08-08 · CVE-2021-23354

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 printf versions prior to 0.6.1

Description The issue concerns a Regular Expression Denial of Service (ReDoS) vulnerability via a regex string in lib/printf.js. The vulnerable regular expression has cubic worst-case time complexity, which can be exploited.

Recommendations For versions prior to 0.6.1, update to version 0.6.1 or later to resolve the issue. As a temporary workaround, consider restricting the use of the vulnerable regex string in lib/printf.js until a patch is available.

Exploit

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-1333

CWE-400

Related Identifiers

CVE-2021-23354

GHSA-XFHP-GMH8-R8V2

SNYK-JS-PRINTF-1072096

Affected Products

Printf

References · 9

• 🔥 https://github.com/adaltas/node-printf/issues/31 · Exploit
• https://github.com/adaltas/node-printf/pull/32 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-23354 · Security Note
• https://osv.dev/vulnerability/CVE-2021-23354 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-xfhp-gmh8-r8v2 · Vendor Advisory
• https://github.com/adaltas/node-printf/commit/a8502e7c9b0b22555696a2d8ef67722086413a68 · Note
• https://t.me/cvenotify/11541 · Telegram Post
• https://t.me/cibsecurity/24849 · Telegram Post
• https://snyk.io/vuln/SNYK-JS-PRINTF-1072096 · Note