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Ubuntu.comUB:CVE-2021-23995
HistoryApr 19, 2021 - 12:00 a.m.

CVE-2021-23995

2021-04-1900:00:00
ubuntu.com
ubuntu.com
6

8.8 High

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

5.1 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:H/Au:N/C:P/I:P/A:P

0.002 Low

EPSS

Percentile

58.7%

When Responsive Design Mode was enabled, it used references to objects that
were previously freed. We presume that with enough effort this could have
been exploited to run arbitrary code. 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
OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchfirefox< 88.0+build2-0ubuntu0.20.04.1UNKNOWN
ubuntu20.10noarchfirefox< 88.0+build2-0ubuntu0.20.10.1UNKNOWN
ubuntu21.04noarchfirefox< 88.0+build2-0ubuntu0.21.04.1UNKNOWN
ubuntu21.10noarchfirefox< 88.0.1+build1-0ubuntu2UNKNOWN
ubuntuupstreamnoarchfirefox< 88.0.1+build1-0ubuntu2UNKNOWN
ubuntuupstreamnoarchfirefox< 88UNKNOWN
ubuntu16.04noarchfirefox< 88.0+build2-0ubuntu0.16.04.1UNKNOWN
ubuntu22.04noarchfirefox< 88.0.1+build1-0ubuntu2UNKNOWN
ubuntuupstreamnoarchfirefox< 88.0.1+build1-0ubuntu2UNKNOWN
ubuntuupstreamnoarchfirefox< 88.0.1+build1-0ubuntu2UNKNOWN
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API usage cases
  • Network scanning
  • Linux Patch management
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Ways of integration

Integrate Vulners API

8.8 High

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

5.1 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:H/Au:N/C:P/I:P/A:P

0.002 Low

EPSS

Percentile

58.7%

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