Vulnerability Description
ffcss is a CLI interface to apply and configure Firefox CSS themes. Prior to 0.2.0, the function `lookupPreprocess()` is meant to apply some transformations to a string by disabling characters in the regex `[-_ .]`. However, due to the use of late Unicode normalization of type NFKD, it is possible to bypass that validation and re-introduce all the characters in the regex `[-_ .]`. The `lookupPreprocess()` can be easily bypassed with equivalent Unicode characters like U+FE4D (﹍), which would result in the omitted U+005F (_), for instance. The `lookupPreprocess()` function is only ever used to search for themes loosely (case insensitively, while ignoring dashes, underscores and dots), so the actual security impact is classified as low. This vulnerability is fixed in 0.2.0. There are no known workarounds.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ewen-Lbh | Firefox Css | < 0.2.0 |
Related Weaknesses (CWE)
References
- https://github.com/ewen-lbh/ffcss/commit/f9c491874b858a32fcae15045f169fd7d02f90dPatch
- https://github.com/ewen-lbh/ffcss/security/advisories/GHSA-wpmx-564x-h2mhExploitVendor Advisory
- https://github.com/ewen-lbh/ffcss/commit/f9c491874b858a32fcae15045f169fd7d02f90dPatch
- https://github.com/ewen-lbh/ffcss/security/advisories/GHSA-wpmx-564x-h2mhExploitVendor Advisory
FAQ
What is CVE-2023-52081?
CVE-2023-52081 is a vulnerability with a CVSS score of 5.3 (MEDIUM). ffcss is a CLI interface to apply and configure Firefox CSS themes. Prior to 0.2.0, the function `lookupPreprocess()` is meant to apply some transformations to a string by disabling characters in the ...
How severe is CVE-2023-52081?
CVE-2023-52081 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-52081?
Check the references section above for vendor advisories and patch information. Affected products include: Ewen-Lbh Firefox Css.