Vulnerability in Linux Kernel
CVE-2021-29987
After requesting multiple permissions, and closing the first permission panel, subsequent permission panels will be displayed in a different position but still record a click in the default location, making it possible to trick a user into accepting a permission they did not want to. *This bug only affects Firefox on Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox < 91 and Thunderbird < 91.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.009 (59.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Linux Kernel
- Mozilla Firefox — versions unspecified
- Mozilla Thunderbird — versions unspecified
Weakness classification (CWE)
References
- www.mozilla.org/security/advisories/mfsa2021-33/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2021-36/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Issue Tracking, Vendor Advisory)
- security.gentoo.org/glsa/202202-03 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-29987?
- CVE-2021-29987 is a medium-severity vulnerability in Linux Kernel, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 6.5/10. Published 2021-08-17.
- How severe is CVE-2021-29987?
- Medium severity. CVSS v3 base score is 6.5 out of 10.