CVE-2021-23354— Regular Expression Denial of Service (ReDoS)
Quick assessment
Affected
n/a printf
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Worms David node-printf是 （Worms David）开源的一个应用软件。一个完整实现的printfC函数族对Node.js的，写在纯JavaScript。 node-printf before 0.6.1 存在安全漏洞，该漏洞源于容易受到正则表达式拒绝服务(ReDoS)。
Possible ATT&CK Techniques 1 AI
T1496 · Resource Hijacking
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I. Basic Information for CVE-2021-23354
Vulnerability Information
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Vulnerability Title
Regular Expression Denial of Service (ReDoS)
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Worms David node-printf 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Worms David node-printf是 （Worms David）开源的一个应用软件。一个完整实现的printfC函数族对Node.js的，写在纯JavaScript。 node-printf before 0.6.1 存在安全漏洞，该漏洞源于容易受到正则表达式拒绝服务(ReDoS)。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | printf | unspecified ~ 0.6.1 | - |
|
II. Public POCs for CVE-2021-23354
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2021-23354 (1)
-
https://github.com/adaltas/node-printf/pull/32 x_refsource_MISC
Vendor Advisories for CVE-2021-23354 (1)
-
https://snyk.io/vuln/SNYK-JS-PRINTF-1072096 x_refsource_MISC
Other References for CVE-2021-23354 (1)
-
https://github.com/adaltas/node-printf/issues/31 x_refsource_MISC
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IV. Related Vulnerabilities
V. Comments for CVE-2021-23354
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