CVE-2021-23999
high
CVSS v3
—
CVSS v2
—
VIR risk
8.0
Description
If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-23999
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-23999.html
Vendor advisory: arch — https://security.archlinux.org/ASA-202104-3
Vendor advisory: arch — https://security.archlinux.org/ASA-202104-4
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 78.10.0-1 | |
| sles | affected | | |
| debian | sid | fixed | 88.0-1 |
| debian | bookworm | fixed | 78.10.0esr-1 |
| debian | bullseye | fixed | 78.10.0esr-1 |
| debian | forky | fixed | 78.10.0esr-1 |
| debian | trixie | fixed | 78.10.0esr-1 |
References
Verify integrity in audit chain (admin only). AS-IS.