UBUNTU-CVE-2021-43540

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Source
https://ubuntu.com/security/CVE-2021-43540
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43540.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-43540
Upstream
  • CVE-2021-43540
Downstream
Related
Published
2021-12-08T00:00:00Z
Modified
2025-09-08T16:47:25Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

WebExtensions with the correct permissions were able to create and install ServiceWorkers for third-party websites that would not have been uninstalled with the extension. This vulnerability affects Firefox < 95.

References

Affected packages

Ubuntu:18.04:LTS / firefox

Package

Name
firefox
Purl
pkg:deb/ubuntu/firefox@95.0+build1-0ubuntu0.18.04.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
95.0+build1-0ubuntu0.18.04.1

Affected versions

56.*

56.0+build6-0ubuntu1

57.*

57.0.1+build2-0ubuntu1

59.*

59.0.1+build1-0ubuntu1
59.0.2+build1-0ubuntu1

60.*

60.0+build2-0ubuntu1
60.0.1+build2-0ubuntu0.18.04.1
60.0.2+build1-0ubuntu0.18.04.1

61.*

61.0+build3-0ubuntu0.18.04.1
61.0.1+build1-0ubuntu0.18.04.1

62.*

62.0+build2-0ubuntu0.18.04.3
62.0+build2-0ubuntu0.18.04.4
62.0+build2-0ubuntu0.18.04.5
62.0.3+build1-0ubuntu0.18.04.1

63.*

63.0+build2-0ubuntu0.18.04.2
63.0.3+build1-0ubuntu0.18.04.1

64.*

64.0+build3-0ubuntu0.18.04.1

65.*

65.0+build2-0ubuntu0.18.04.1
65.0.1+build2-0ubuntu0.18.04.1

66.*

66.0+build3-0ubuntu0.18.04.1
66.0.1+build1-0ubuntu0.18.04.1
66.0.2+build1-0ubuntu0.18.04.1
66.0.3+build1-0ubuntu0.18.04.1
66.0.4+build3-0ubuntu0.18.04.1
66.0.5+build1-0ubuntu0.18.04.1

67.*

67.0+build2-0ubuntu0.18.04.1
67.0.1+build1-0ubuntu0.18.04.1
67.0.2+build2-0ubuntu0.18.04.1
67.0.3+build1-0ubuntu0.18.04.1
67.0.4+build1-0ubuntu0.18.04.1

68.*

68.0+build3-0ubuntu0.18.04.1
68.0.1+build1-0ubuntu0.18.04.1
68.0.2+build1-0ubuntu0.18.04.1

69.*

69.0+build2-0ubuntu0.18.04.1
69.0.1+build1-0ubuntu0.18.04.1
69.0.2+build1-0ubuntu0.18.04.1

70.*

70.0+build2-0ubuntu0.18.04.1
70.0.1+build1-0ubuntu0.18.04.1

71.*

71.0+build5-0ubuntu0.18.04.1

72.*

72.0.1+build1-0ubuntu0.18.04.1
72.0.2+build1-0ubuntu0.18.04.1

73.*

73.0+build3-0ubuntu0.18.04.1
73.0.1+build1-0ubuntu0.18.04.1

74.*

74.0+build3-0ubuntu0.18.04.1
74.0.1+build1-0ubuntu0.18.04.1

75.*

75.0+build3-0ubuntu0.18.04.1

76.*

76.0+build2-0ubuntu0.18.04.1
76.0.1+build1-0ubuntu0.18.04.1

77.*

77.0.1+build1-0ubuntu0.18.04.1

78.*

78.0.1+build1-0ubuntu0.18.04.1
78.0.2+build2-0ubuntu0.18.04.1

79.*

79.0+build1-0ubuntu0.18.04.1

80.*

80.0+build2-0ubuntu0.18.04.1
80.0.1+build1-0ubuntu0.18.04.1

81.*

81.0+build2-0ubuntu0.18.04.1
81.0.2+build1-0ubuntu0.18.04.1

82.*

82.0+build2-0ubuntu0.18.04.1
82.0.2+build1-0ubuntu0.18.04.1
82.0.3+build1-0ubuntu0.18.04.1

83.*

83.0+build2-0ubuntu0.18.04.2

84.*

84.0+build3-0ubuntu0.18.04.1
84.0.1+build1-0ubuntu0.18.04.1
84.0.2+build1-0ubuntu0.18.04.1

85.*

85.0+build1-0ubuntu0.18.04.1
85.0.1+build1-0ubuntu0.18.04.1

86.*

86.0+build3-0ubuntu0.18.04.1
86.0.1+build1-0ubuntu0.18.04.1

87.*

87.0+build3-0ubuntu0.18.04.2

88.*

88.0+build2-0ubuntu0.18.04.2
88.0.1+build1-0ubuntu0.18.04.2

89.*

89.0+build2-0ubuntu0.18.04.2
89.0.1+build1-0ubuntu0.18.04.1
89.0.2+build1-0ubuntu0.18.04.1

90.*

90.0+build1-0ubuntu0.18.04.1
90.0.2+build1-0ubuntu0.18.04.1

91.*

91.0+build2-0ubuntu0.18.04.1
91.0.1+build1-0ubuntu0.18.04.1
91.0.2+build1-0ubuntu0.18.04.1

92.*

92.0+build3-0ubuntu0.18.04.1

93.*

93.0+build1-0ubuntu0.18.04.1

94.*

94.0+build3-0ubuntu0.18.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "95.0+build1-0ubuntu0.18.04.1"
        },
        {
            "binary_name": "firefox-dev",
            "binary_version": "95.0+build1-0ubuntu0.18.04.1"
        },
        {
            "binary_name": "firefox-geckodriver",
            "binary_version": "95.0+build1-0ubuntu0.18.04.1"
        },
        {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "95.0+build1-0ubuntu0.18.04.1"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / firefox

Package

Name
firefox
Purl
pkg:deb/ubuntu/firefox@95.0+build1-0ubuntu0.20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
95.0+build1-0ubuntu0.20.04.1

Affected versions

69.*

69.0.3+build1-0ubuntu1

70.*

70.0+build2-0ubuntu1
70.0+build2-0ubuntu2
70.0.1+build1-0ubuntu2

71.*

71.0+build2-0ubuntu2
71.0+build5-0ubuntu1

72.*

72.0.1+build1-0ubuntu1
72.0.2+build1-0ubuntu1

73.*

73.0+build1-0ubuntu1
73.0+build2-0ubuntu1
73.0+build3-0ubuntu1
73.0.1+build1-0ubuntu1

74.*

74.0+build1-0ubuntu1
74.0+build2-0ubuntu1
74.0+build2-0ubuntu2
74.0+build3-0ubuntu1

75.*

75.0+build3-0ubuntu1

76.*

76.0+build2-0ubuntu0.20.04.1
76.0.1+build1-0ubuntu0.20.04.1

77.*

77.0.1+build1-0ubuntu0.20.04.1

78.*

78.0.1+build1-0ubuntu0.20.04.1
78.0.2+build2-0ubuntu0.20.04.1

79.*

79.0+build1-0ubuntu0.20.04.1

80.*

80.0+build2-0ubuntu0.20.04.1
80.0.1+build1-0ubuntu0.20.04.1

81.*

81.0+build2-0ubuntu0.20.04.1
81.0.2+build1-0ubuntu0.20.04.1

82.*

82.0+build2-0ubuntu0.20.04.1
82.0.2+build1-0ubuntu0.20.04.1
82.0.3+build1-0ubuntu0.20.04.1

83.*

83.0+build2-0ubuntu0.20.04.1

84.*

84.0+build3-0ubuntu0.20.04.1
84.0.1+build1-0ubuntu0.20.04.1
84.0.2+build1-0ubuntu0.20.04.1

85.*

85.0+build1-0ubuntu0.20.04.1
85.0.1+build1-0ubuntu0.20.04.1

86.*

86.0+build3-0ubuntu0.20.04.1
86.0.1+build1-0ubuntu0.20.04.1

87.*

87.0+build3-0ubuntu0.20.04.2

88.*

88.0+build2-0ubuntu0.20.04.1
88.0.1+build1-0ubuntu0.20.04.2

89.*

89.0+build2-0ubuntu0.20.04.2
89.0.1+build1-0ubuntu0.20.04.1
89.0.2+build1-0ubuntu0.20.04.1

90.*

90.0+build1-0ubuntu0.20.04.1
90.0.2+build1-0ubuntu0.20.04.1

91.*

91.0+build2-0ubuntu0.20.04.1
91.0.1+build1-0ubuntu0.20.04.1
91.0.2+build1-0ubuntu0.20.04.1

92.*

92.0+build3-0ubuntu0.20.04.1

93.*

93.0+build1-0ubuntu0.20.04.1

94.*

94.0+build3-0ubuntu0.20.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "95.0+build1-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "firefox-dev",
            "binary_version": "95.0+build1-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "firefox-geckodriver",
            "binary_version": "95.0+build1-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "95.0+build1-0ubuntu0.20.04.1"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:22.04:LTS / firefox

Package

Name
firefox
Purl
pkg:deb/ubuntu/firefox@95.0+build1-0ubuntu1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
95.0+build1-0ubuntu1

Affected versions

93.*

93.0+build1-0ubuntu3

94.*

94.0+build3-0ubuntu1
94.0.2+build1-0ubuntu1
94.0.2+build2-0ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "95.0+build1-0ubuntu1"
        },
        {
            "binary_name": "firefox-dev",
            "binary_version": "95.0+build1-0ubuntu1"
        },
        {
            "binary_name": "firefox-geckodriver",
            "binary_version": "95.0+build1-0ubuntu1"
        },
        {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "95.0+build1-0ubuntu1"
        }
    ],
    "availability": "No subscription required"
}