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
EPSS: 0.031 (86.4th percentile) — read the EPSS interpretation.
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.
Affected products
- Apple Macos
- Brave
- Linux Linux_kernel
- Microsoft Windows
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes, Issue Tracking)
- cve@mitre.org (Permissions Required, x_refsource_MISC)
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.