CVE-2023-4056: Critical severity Mozilla Thunderbird vulnerability

Published Aug 1, 2023
·
Updated

Last updated 24 July 2024

Other sources

Memory safety bugs present in Firefox 115, Firefox ESR 115.0, Firefox ESR 102.13, Thunderbird 115.0, and Thunderbird 102.13. 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.

— Mozilla

Affected Software

27 affected componentsFixes available
redhat/firefox<102.14
102.14
redhat/firefox<115.1
115.1
redhat/thunderbird<102.14
102.14
redhat/thunderbird<115.1
115.1
Mozilla Thunderbird<115.1
115.1
Mozilla Thunderbird<102.14
102.14
Mozilla Firefox<116
116
Mozilla Firefox ESR<102.14
102.14
Mozilla Firefox ESR<115.1
115.1
Mozilla Firefox<116.0
Mozilla Firefox>=102.0<102.14
Mozilla Firefox>=115.0<115.1
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Debian Debian Linux=12.0
Mozilla Firefox ESR<102.14
Mozilla Firefox ESR>=102.0<102.14
Mozilla Firefox ESR>=115.0<115.1
debian/firefox
137.0.2-1
debian/firefox-esr
115.14.0esr-1~deb11u1128.9.0esr-1~deb11u1128.8.0esr-1~deb12u1128.9.0esr-1~deb12u1128.9.0esr-2
debian/thunderbird
1:115.12.0-1~deb11u11:128.9.0esr-1~deb11u11:128.8.0esr-1~deb12u11:128.9.0esr-1~deb12u11:128.9.0esr-1
alpine/firefox-esr<115.1.0-r0
115.1.0-r0
alpine/firefox-esr<115.1.0-r0
115.1.0-r0
alpine/firefox-esr<115.1.0-r0
115.1.0-r0
alpine/firefox-esr<115.1.0-r0
115.1.0-r0
alpine/firefox-esr<115.1.0-r0
115.1.0-r0
alpine/firefox-esr<115.1.0-r0
115.1.0-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/firefox to a version that resolves this vulnerability.

    Fixed in 102.14
  2. Upgrade

    Upgrade redhat/firefox to a version that resolves this vulnerability.

    Fixed in 115.1
  3. Upgrade

    Upgrade redhat/thunderbird to a version that resolves this vulnerability.

    Fixed in 102.14
  4. Upgrade

    Upgrade redhat/thunderbird to a version that resolves this vulnerability.

    Fixed in 115.1
  5. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 115.1
  6. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 102.14
  7. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 116
  8. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 102.14
  9. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 115.1
  10. Upgrade

    Upgrade debian/firefox to a version that resolves this vulnerability.

    Fixed in 137.0.2-1
  11. Upgrade

    Upgrade debian/firefox-esr to a version that resolves this vulnerability.

    Fixed in 115.14.0esr-1~deb11u1Fixed in 128.9.0esr-1~deb11u1Fixed in 128.8.0esr-1~deb12u1Fixed in 128.9.0esr-1~deb12u1Fixed in 128.9.0esr-2
  12. Upgrade

    Upgrade debian/thunderbird to a version that resolves this vulnerability.

    Fixed in 1:115.12.0-1~deb11u1Fixed in 1:128.9.0esr-1~deb11u1Fixed in 1:128.8.0esr-1~deb12u1Fixed in 1:128.9.0esr-1~deb12u1Fixed in 1:128.9.0esr-1
  13. Upgrade

    Upgrade Mozilla Firefox to a version that resolves this vulnerability.

    Fixed in 116
  14. Upgrade

    Upgrade Mozilla Firefox ESR to a version that resolves this vulnerability.

    Fixed in 102.14
  15. Upgrade

    Upgrade Mozilla Firefox ESR to a version that resolves this vulnerability.

    Fixed in 115.1

Event History

Aug 1, 2023
CVE Published
via Mozilla·12:00 AM
CVE Published
via MITRE·03:01 PM
Data Sourced
via MITRE·03:01 PM
DescriptionWeakness
Data Sourced
via NVD·04:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·04:15 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is CVE-2023-4056?

CVE-2023-4056 is a vulnerability related to memory safety bugs present in Firefox and Thunderbird.

2

Which software versions are affected by CVE-2023-4056?

CVE-2023-4056 affects Firefox versions up to and excluding 116, Firefox ESR versions up to and excluding 102.14, Thunderbird versions up to and excluding 115.1, and Thunderbird ESR versions up to and excluding 102.14.

3

What is the severity of CVE-2023-4056?

CVE-2023-4056 has a severity rating of 9.8, which is considered critical.

4

How can I fix CVE-2023-4056?

To fix CVE-2023-4056, update your Firefox and Thunderbird installations to versions 116 (or later), 102.14 (or later), 115.1 (or later), and 102.14 (or later) respectively.

5

Where can I find more information about CVE-2023-4056?

You can find more information about CVE-2023-4056 in the following references: [Reference 1](https://bugzilla.mozilla.org/buglist.cgi?bug_id=1820587%2C1824634%2C1839235%2C1842325%2C1843847), [Reference 2](https://www.mozilla.org/en-US/security/advisories/mfsa2023-33/), [Reference 3](https://www.mozilla.org/en-US/security/advisories/mfsa2023-32/).

Company

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