UBUNTU-CVE-2021-43534
- Source
- https://ubuntu.com/security/CVE-2021-43534
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43534.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-43534
- Upstream
- Downstream
- Related
- Published
- 2021-12-08T22:15:00Z
- Modified
- 2025-09-08T16:47:24Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
- References
-
- https://ubuntu.com/security/CVE-2021-43534
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-48/#CVE-2021-43534
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-49/#CVE-2021-43534
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-50/#CVE-2021-43534
- https://www.mozilla.org/security/advisories/mfsa2021-50/
- https://www.mozilla.org/security/advisories/mfsa2021-49/
- https://www.mozilla.org/security/advisories/mfsa2021-48/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152
- https://ubuntu.com/security/notices/USN-5248-1
- https://www.cve.org/CVERecord?id=CVE-2021-43534
Affected packages
Ubuntu:18.04:LTS / thunderbird
Package
- Name
- thunderbird
- Purl
- pkg:deb/ubuntu/thunderbird@1:91.5.0+build1-0ubuntu0.18.04.1?arch=source&distro=bionic
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1:91.5.0+build1-0ubuntu0.18.04.1
Affected versions
1:52.*
1:52.4.0+build1-0ubuntu2
1:52.6.0+build1-0ubuntu1
1:52.7.0+build1-0ubuntu1
1:52.8.0+build1-0ubuntu0.18.04.1
1:52.9.1+build3-0ubuntu0.18.04.1
1:60.*
1:60.2.1+build1-0ubuntu0.18.04.2
1:60.4.0+build2-0ubuntu0.18.04.1
1:60.5.1+build2-0ubuntu0.18.04.1
1:60.6.1+build2-0ubuntu0.18.04.1
1:60.7.0+build1-0ubuntu0.18.04.1
1:60.7.1+build1-0ubuntu0.18.04.1
1:60.7.2+build2-0ubuntu0.18.04.1
1:60.8.0+build1-0ubuntu0.18.04.1
1:60.9.0+build1-0ubuntu0.18.04.1
1:68.*
1:68.2.1+build1-0ubuntu0.18.04.1
1:68.2.2+build1-0ubuntu0.18.04.1
1:68.4.1+build1-0ubuntu0.18.04.1
1:68.7.0+build1-0ubuntu0.18.04.1
1:68.8.0+build2-0ubuntu0.18.04.2
1:68.10.0+build1-0ubuntu0.18.04.1
1:78.*
1:78.8.1+build1-0ubuntu0.18.04.1
1:78.11.0+build1-0ubuntu0.18.04.2
1:78.13.0+build1-0ubuntu0.18.04.1
1:78.14.0+build1-0ubuntu0.18.04.1
1:78.14.0+build1-0ubuntu0.18.04.2
Ecosystem specific
{
"availability": "No subscription required",
"binaries": [
{
"binary_name": "thunderbird",
"binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1"
},
{
"binary_name": "thunderbird-dev",
"binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1"
},
{
"binary_name": "thunderbird-gnome-support",
"binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1"
},
{
"binary_name": "thunderbird-mozsymbols",
"binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1"
},
{
"binary_name": "xul-ext-calendar-timezones",
"binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1"
},
{
"binary_name": "xul-ext-gdata-provider",
"binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1"
},
{
"binary_name": "xul-ext-lightning",
"binary_version": "1:91.5.0+build1-0ubuntu0.18.04.1"
}
]
}
Ubuntu:20.04:LTS / thunderbird
Package
- Name
- thunderbird
- Purl
- pkg:deb/ubuntu/thunderbird@1:91.5.0+build1-0ubuntu0.20.04.1?arch=source&distro=focal
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1:91.5.0+build1-0ubuntu0.20.04.1
Affected versions
1:68.*
1:68.1.2+build1-0ubuntu1
1:68.1.2+build1-0ubuntu2
1:68.2.1+build1-0ubuntu1
1:68.2.2+build1-0ubuntu1
1:68.3.0+build2-0ubuntu1
1:68.3.1+build1-0ubuntu2
1:68.4.1+build1-0ubuntu1
1:68.4.2+build2-0ubuntu1
1:68.5.0+build1-0ubuntu1
1:68.6.0+build2-0ubuntu1
1:68.7.0+build1-0ubuntu1
1:68.7.0+build1-0ubuntu2
1:68.8.0+build2-0ubuntu0.20.04.2
1:68.10.0+build1-0ubuntu0.20.04.1
1:78.*
1:78.7.1+build1-0ubuntu0.20.04.1
1:78.8.1+build1-0ubuntu0.20.04.1
1:78.11.0+build1-0ubuntu0.20.04.2
1:78.13.0+build1-0ubuntu0.20.04.2
1:78.14.0+build1-0ubuntu0.20.04.1
1:78.14.0+build1-0ubuntu0.20.04.2
Ecosystem specific
{
"availability": "No subscription required",
"binaries": [
{
"binary_name": "thunderbird",
"binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1"
},
{
"binary_name": "thunderbird-dev",
"binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1"
},
{
"binary_name": "thunderbird-gnome-support",
"binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1"
},
{
"binary_name": "thunderbird-mozsymbols",
"binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1"
},
{
"binary_name": "xul-ext-calendar-timezones",
"binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1"
},
{
"binary_name": "xul-ext-gdata-provider",
"binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1"
},
{
"binary_name": "xul-ext-lightning",
"binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1"
}
]
}