Information disclosure in Apple macOS
CVE-2021-45884
In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outside of the proxying extension using the system's DNS settings, resulting in information disclosure. NOTE: this issue exists because of an incomplete fix for CVE-2021-21323 and CVE-2021-22916.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.031 (87.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/brave/brave-core/pull/10742 (Patch, Third Party Advisory)
- github.com/brave/brave-browser/issues/19070 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- github.com/brave/brave-browser/issues/20079 (Third Party Advisory, Release Notes, Issue Tracking)
- hackerone.com/reports/1377864 (Permissions Required)
Frequently asked questions
- What is CVE-2021-45884?
- CVE-2021-45884 is a high-severity vulnerability in Apple macOS, classified under Information Disclosure. CVSS score: 7.5/10. Published 2021-12-27.
- How severe is CVE-2021-45884?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-45884 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.