CVE-2021-23986
Description
A malicious extension with the 'search' permission could have installed a new search engine whose favicon referenced a cross-origin URL. The response to this cross-origin request could have been read by the extension, allowing a same-origin policy bypass by the extension, which should not have cross-origin permissions. This cross-origin request was made without cookies, so the sensitive information disclosed by the violation was limited to local-network resources or resources that perform IP-based authentication. This vulnerability affects Firefox < 87.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-23986
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-23986.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 87.0-1 | |
| sles | affected | | |
| debian | sid | fixed | 87.0-1 |
References
Verify integrity in audit chain (admin only). AS-IS.