Ubuntu.comUB:CVE-2021-43538CVE-2021-43538
4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.001 Low
EPSS
Percentile
44.9%
By misusing a race in our notification code, an attacker could have
forcefully hidden the notification for pages that had received full screen
and pointer lock access, which could have been used for spoofing attacks.
This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and
Firefox < 95.
Notes
| Author | Note |
|---|---|
| tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | firefox | < 95.0+build1-0ubuntu0.18.04.1 | UNKNOWN |
| ubuntu | 20.04 | noarch | firefox | < 95.0+build1-0ubuntu0.20.04.1 | UNKNOWN |
| ubuntu | 21.04 | noarch | firefox | < 95.0+build1-0ubuntu0.21.04.1 | UNKNOWN |
| ubuntu | 21.10 | noarch | firefox | < 95.0+build1-0ubuntu0.21.10.1 | UNKNOWN |
| ubuntu | 22.04 | noarch | firefox | < 95.0+build1-0ubuntu1 | UNKNOWN |
| ubuntu | 22.10 | noarch | firefox | < 95.0+build1-0ubuntu1 | UNKNOWN |
| ubuntu | 23.04 | noarch | firefox | < 95.0+build1-0ubuntu1 | UNKNOWN |
| ubuntu | 23.10 | noarch | firefox | < 95.0+build1-0ubuntu1 | UNKNOWN |
| ubuntu | 24.04 | noarch | firefox | < 95.0+build1-0ubuntu1 | UNKNOWN |
| ubuntu | 18.04 | noarch | mozjs38 | < any | UNKNOWN |
References
launchpad.net/bugs/cve/CVE-2021-43538
nvd.nist.gov/vuln/detail/CVE-2021-43538
security-tracker.debian.org/tracker/CVE-2021-43538
ubuntu.com/security/notices/USN-5186-1
ubuntu.com/security/notices/USN-5246-1
ubuntu.com/security/notices/USN-5248-1
www.cve.org/CVERecord?id=CVE-2021-43538
www.mozilla.org/en-US/security/advisories/mfsa2021-52/#CVE-2021-43538
www.mozilla.org/en-US/security/advisories/mfsa2021-53/#CVE-2021-43538
www.mozilla.org/en-US/security/advisories/mfsa2021-54/#CVE-2021-43538
Related
4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.001 Low
EPSS
Percentile
44.9%