Ubuntu.comUB:CVE-2021-23999CVE-2021-23999
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
71.6%
If a Blob URL was loaded through some unusual user interaction, it could
have been loaded by the System Principal and granted additional privileges
that should not be granted to web content. This vulnerability affects
Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
Notes
| Author | Note |
|---|---|
| tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | firefox | < 88.0+build2-0ubuntu0.18.04.2 | UNKNOWN |
| ubuntu | 20.04 | noarch | firefox | < 88.0+build2-0ubuntu0.20.04.1 | UNKNOWN |
| ubuntu | 20.10 | noarch | firefox | < 88.0+build2-0ubuntu0.20.10.1 | UNKNOWN |
| ubuntu | 21.04 | noarch | firefox | < 88.0+build2-0ubuntu0.21.04.1 | UNKNOWN |
| ubuntu | 21.10 | noarch | firefox | < 88.0.1+build1-0ubuntu2 | UNKNOWN |
| ubuntu | 22.04 | noarch | firefox | < 88.0.1+build1-0ubuntu2 | UNKNOWN |
| ubuntu | 22.10 | noarch | firefox | < 88.0.1+build1-0ubuntu2 | UNKNOWN |
| ubuntu | 23.04 | noarch | firefox | < 88.0.1+build1-0ubuntu2 | UNKNOWN |
| ubuntu | 23.10 | noarch | firefox | < 88.0.1+build1-0ubuntu2 | UNKNOWN |
| ubuntu | 24.04 | noarch | firefox | < 88.0.1+build1-0ubuntu2 | UNKNOWN |
References
launchpad.net/bugs/cve/CVE-2021-23999
nvd.nist.gov/vuln/detail/CVE-2021-23999
security-tracker.debian.org/tracker/CVE-2021-23999
ubuntu.com/security/notices/USN-4926-1
ubuntu.com/security/notices/USN-4995-1
ubuntu.com/security/notices/USN-4995-2
www.cve.org/CVERecord?id=CVE-2021-23999
www.mozilla.org/en-US/security/advisories/mfsa2021-14/#CVE-2021-23999
www.mozilla.org/en-US/security/advisories/mfsa2021-15/#CVE-2021-23999
www.mozilla.org/en-US/security/advisories/mfsa2021-16/#CVE-2021-23999
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
71.6%