Ubuntu.comUB:CVE-2021-38493CVE-2021-38493
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
74.7%
Mozilla developers reported memory safety bugs present in Firefox 91 and
Firefox ESR 78.13. Some of these bugs showed evidence of memory corruption
and we presume that with enough effort some of these could have been
exploited to run arbitrary code. This vulnerability affects Firefox ESR <
78.14, Thunderbird < 78.14, and Firefox < 92.
Notes
| Author | Note |
|---|---|
| tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | firefox | < 92.0+build3-0ubuntu0.18.04.1 | UNKNOWN |
| ubuntu | 20.04 | noarch | firefox | < 92.0+build3-0ubuntu0.20.04.1 | UNKNOWN |
| ubuntu | 21.04 | noarch | firefox | < 92.0+build3-0ubuntu0.21.04.1 | UNKNOWN |
| ubuntu | 21.10 | noarch | firefox | < 92.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 22.04 | noarch | firefox | < 92.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 22.10 | noarch | firefox | < 92.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 23.04 | noarch | firefox | < 92.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 23.10 | noarch | firefox | < 92.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 24.04 | noarch | firefox | < 92.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 18.04 | noarch | mozjs38 | < any | UNKNOWN |
References
access.redhat.com/security/cve/CVE-2021-38493
launchpad.net/bugs/cve/CVE-2021-38493
nvd.nist.gov/vuln/detail/CVE-2021-38493
security-tracker.debian.org/tracker/CVE-2021-38493
ubuntu.com/security/notices/USN-5074-1
ubuntu.com/security/notices/USN-5146-1
www.cve.org/CVERecord?id=CVE-2021-38493
www.mozilla.org/en-US/security/advisories/mfsa2021-38/#CVE-2021-38493
www.mozilla.org/en-US/security/advisories/mfsa2021-39/#CVE-2021-38493
www.mozilla.org/en-US/security/advisories/mfsa2021-42/#CVE-2021-38493
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
74.7%