CVE-2022-4891 — A vulnerability has been found in Sisimai up to 4
A vulnerability has been found in Sisimai up to 4.25.14p11 and classified as problematic. This vulnerability affects the function to_plain of the file lib/sisimai/string.rb. The manipulation leads to inefficient regular expression complexity. The exploit has been disclosed to the
Published
2023-01-17T19:58:03.654Z
Last modified
2024-08-03T01:55:45.948Z
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
01What is this vulnerability?
A vulnerability has been found in Sisimai up to 4.25.14p11 and classified as problematic. This vulnerability affects the function to_plain of the file lib/sisimai/string.rb. The manipulation leads to inefficient regular expression complexity. The exploit has been disclosed to the public and may be used. Upgrading to version 4.25.14p12 is able to address this issue. The name of the patch is…
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / Sisimai | 4.25.14p11 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-01-17T19:58:03.654Z
- Last modified: 2024-08-03T01:55:45.948Z
09References
- vuldb.com — https://vuldb.com/?id.218452
- vuldb.com — https://vuldb.com/?ctiid.218452
- github.com — https://github.com/sisimai/rb-sisimai/pull/244
- gist.githubusercontent.com — https://gist.githubusercontent.com/gmcabrita/e5dc0332473fc2e3a7a407434c8d21c7/ra…
- github.com — https://github.com/sisimai/rb-sisimai/commit/51fe2e6521c9c02b421b383943dc9e4bbbe…
- github.com — https://github.com/sisimai/rb-sisimai/releases/tag/v4.25.14p12
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