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ubuntucveUbuntu.comUB:CVE-2021-23961
HistoryJan 26, 2021 - 12:00 a.m.

CVE-2021-23961

2021-01-2600:00:00
ubuntu.com
ubuntu.com
11
cve-2021-23961
firefox
slipstream research
malicious webpage
internal network
local services
spidermonkey javascript engine

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

7.4

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

EPSS

0.009

Percentile

82.4%

JSON

Further techniques that built on the slipstream research combined with a
malicious webpage could have exposed both an internal network’s hosts as
well as services running on the user’s local machine. This vulnerability
affects Firefox < 85.

Notes

Author Note
tyhicks mozjs contains a copy of the SpiderMonkey JavaScript engine
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchfirefox< 85.0+build1-0ubuntu0.18.04.1UNKNOWN
ubuntu20.04noarchfirefox< 85.0+build1-0ubuntu0.20.04.1UNKNOWN
ubuntu20.10noarchfirefox< 85.0+build1-0ubuntu0.20.10.1UNKNOWN
ubuntu21.04noarchfirefox< 85.0+build1-0ubuntu1UNKNOWN
ubuntu21.10noarchfirefox< 85.0+build1-0ubuntu1UNKNOWN
ubuntu22.04noarchfirefox< 85.0+build1-0ubuntu1UNKNOWN
ubuntu22.10noarchfirefox< 85.0+build1-0ubuntu1UNKNOWN
ubuntu23.04noarchfirefox< 85.0+build1-0ubuntu1UNKNOWN
ubuntu23.10noarchfirefox< 85.0+build1-0ubuntu1UNKNOWN
ubuntu24.04noarchfirefox< 85.0+build1-0ubuntu1UNKNOWN
Rows per page:
1-10 of 211

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CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

7.4

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

EPSS

0.009

Percentile

82.4%

JSON
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