6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
0.001 Low
EPSS
Percentile
46.4%
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.
Author | Note |
---|---|
tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | firefox | < 91.0+build2-0ubuntu0.18.04.1 | UNKNOWN |
ubuntu | 20.04 | noarch | firefox | < 91.0+build2-0ubuntu0.20.04.1 | UNKNOWN |
ubuntu | 21.04 | noarch | firefox | < 91.0+build2-0ubuntu0.21.04.1 | UNKNOWN |
ubuntu | 21.10 | noarch | firefox | < 91.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 22.04 | noarch | firefox | < 91.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 22.10 | noarch | firefox | < 91.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 23.04 | noarch | firefox | < 91.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 23.10 | noarch | firefox | < 91.0+build2-0ubuntu1 | UNKNOWN |
ubuntu | 18.04 | noarch | mozjs38 | < any | UNKNOWN |
ubuntu | 18.04 | noarch | mozjs52 | < any | UNKNOWN |
launchpad.net/bugs/cve/CVE-2021-29987
nvd.nist.gov/vuln/detail/CVE-2021-29987
security-tracker.debian.org/tracker/CVE-2021-29987
ubuntu.com/security/notices/USN-5037-1
ubuntu.com/security/notices/USN-5248-1
www.cve.org/CVERecord?id=CVE-2021-29987
www.mozilla.org/en-US/security/advisories/mfsa2021-33/#CVE-2021-29987
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
0.001 Low
EPSS
Percentile
46.4%