CVE-2023-28120 — There is a vulnerability in ActiveSupport if the new bytesplice method is called
There is a vulnerability in ActiveSupport if the new bytesplice method is called on a SafeBuffer with untrusted user input.
Published
2025-01-09T00:33:47.658Z
Last modified
2025-01-09T21:46:38.220Z
01What is this vulnerability?
There is a vulnerability in ActiveSupport if the new bytesplice method is called on a SafeBuffer with untrusted user input.
02Affected products
| Vendor | Product | Versions |
|---|
| Rails | ActiveSupport | 7.0.4.3, 6.1.7.3 |
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: 2025-01-09T00:33:47.658Z
- Last modified: 2025-01-09T21:46:38.220Z
09References
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