Ubuntu.comUB:CVE-2021-23975CVE-2021-23975
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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
38.4%
The developer page about:memory has a Measure function for exploring what
object types the browser has allocated and their sizes. When this function
was invoked we incorrectly called the sizeof function, instead of using the
API method that checks for invalid pointers. This vulnerability affects
Firefox < 86.
Notes
| Author | Note |
|---|---|
| tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | firefox | < 86.0+build3-0ubuntu0.18.04.1 | UNKNOWN |
| ubuntu | 20.04 | noarch | firefox | < 86.0+build3-0ubuntu0.20.04.1 | UNKNOWN |
| ubuntu | 20.10 | noarch | firefox | < 86.0+build3-0ubuntu0.20.10.1 | UNKNOWN |
| ubuntu | 21.04 | noarch | firefox | < 86.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 21.10 | noarch | firefox | < 86.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 22.04 | noarch | firefox | < 86.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 22.10 | noarch | firefox | < 86.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 23.04 | noarch | firefox | < 86.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 23.10 | noarch | firefox | < 86.0+build3-0ubuntu1 | UNKNOWN |
| ubuntu | 24.04 | noarch | firefox | < 86.0+build3-0ubuntu1 | UNKNOWN |
References
bugzilla.mozilla.org/show_bug.cgi?id=1685145
launchpad.net/bugs/cve/CVE-2021-23975
nvd.nist.gov/vuln/detail/CVE-2021-23975
security-tracker.debian.org/tracker/CVE-2021-23975
ubuntu.com/security/notices/USN-4756-1
www.cve.org/CVERecord?id=CVE-2021-23975
www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23975
www.mozilla.org/security/advisories/mfsa2021-07/
Related
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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
38.4%