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CVE-2021-23986

Publication date 25 March 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

A malicious extension with the 'search' permission could have installed a new search engine whose favicon referenced a cross-origin URL. The response to this cross-origin request could have been read by the extension, allowing a same-origin policy bypass by the extension, which should not have cross-origin permissions. This cross-origin request was made without cookies, so the sensitive information disclosed by the violation was limited to local-network resources or resources that perform IP-based authentication. This vulnerability affects Firefox < 87.

Read the notes from the security team

Status

Package Ubuntu Release Status
firefox 24.04 LTS noble
Fixed 87.0+build3-0ubuntu1
23.10 mantic
Fixed 87.0+build3-0ubuntu1
23.04 lunar
Fixed 87.0+build3-0ubuntu1
22.10 kinetic
Fixed 87.0+build3-0ubuntu1
22.04 LTS jammy
Fixed 87.0+build3-0ubuntu1
21.10 impish
Fixed 87.0+build3-0ubuntu1
21.04 hirsute
Fixed 87.0+build3-0ubuntu1
20.10 groovy
Fixed 87.0+build3-0ubuntu0.20.10.1
20.04 LTS focal
Fixed 87.0+build3-0ubuntu0.20.04.2
18.04 LTS bionic
Fixed 87.0+build3-0ubuntu0.18.04.2
16.04 LTS xenial
Fixed 87.0+build3-0ubuntu0.16.04.2
14.04 LTS trusty Not in release
mozjs38 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Ignored
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
mozjs52 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Ignored
20.04 LTS focal Ignored
18.04 LTS bionic Ignored
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
mozjs68 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Ignored
20.04 LTS focal Ignored
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
mozjs78 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Ignored
22.10 kinetic Ignored
22.04 LTS jammy Ignored
21.10 impish Ignored
21.04 hirsute Ignored
20.10 groovy Ignored
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

Notes

tyhicks

mozjs contains a copy of the SpiderMonkey JavaScript engine

Severity score breakdown

Parameter Value
Base score 6.5 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-4893-1
    • Firefox vulnerabilities
    • 25 March 2021

Other references