Vulnerability in Adaltas Printf
CVE-2021-23354
The package printf before 0.6.1 are vulnerable to Regular Expression Denial of Service (ReDoS) via the regex string /\%(?:\(([\w_.]+)\)|([1-9]\d*)\$)?([0 +\-\]*)(\*|\d+)?(\.)?(\*|\d+)?[hlL]?([\%bscdeEfFgGioOuxX])/g in lib/printf.js. The vulnerable regular expression has cubic worst-case time complexity.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
EPSS: 0.022 (80.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Adaltas Printf
- N/a Printf — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- report@snyk.io (x_refsource_MISC, Broken Link)
- report@snyk.io (Patch, Third Party Advisory, x_refsource_MISC)
- report@snyk.io (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2021-23354?
- CVE-2021-23354 is a medium-severity vulnerability in Adaltas Printf, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2021-03-12.
- How severe is CVE-2021-23354?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-23354 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.