CVE-2023-4049: Use After Free

Q: What is the severity of CVE-2023-4049?

The severity of CVE-2023-4049 is high.

Q: Which software versions are affected by CVE-2023-4049?

The affected software versions are Firefox <116, Firefox ESR <102.14, and Firefox ESR <115.1.

Q: How can I fix CVE-2023-4049?

To fix CVE-2023-4049, update to Firefox version 116 or later, Firefox ESR version 102.14 or later, or Firefox ESR version 115.1 or later.

Q: Where can I find more information about CVE-2023-4049?

You can find more information about CVE-2023-4049 in the following references: [link1], [link2], [link3].

Published Aug 1, 2023

Updated

Last updated 24 July 2024

Other sources

Race conditions in reference counting code were found through code inspection. These could have resulted in potentially exploitable use-after-free vulnerabilities.

— Mozilla

Affected Software

25 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<115.1

115.1

Mozilla Firefox ESR<102.14

102.14

Mozilla Firefox<116.0

Mozilla Firefox ESR>=102.0<102.14

Mozilla Firefox ESR>=115.0<115.1

Debian Debian Linux=11.0

Debian Debian Linux=12.0

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

Mozilla Firefox>=102.0<102.14

Mozilla Firefox>=115.0<115.1

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.

Upgrade
Upgrade redhat/firefox to a version that resolves this vulnerability.
Fixed in 102.14
Upgrade
Upgrade redhat/firefox to a version that resolves this vulnerability.
Fixed in 115.1
Upgrade
Upgrade redhat/thunderbird to a version that resolves this vulnerability.
Fixed in 102.14
Upgrade
Upgrade redhat/thunderbird to a version that resolves this vulnerability.
Fixed in 115.1
Upgrade
Upgrade Thunderbird to a version that resolves this vulnerability.
Fixed in 115.1
Upgrade
Upgrade Thunderbird to a version that resolves this vulnerability.
Fixed in 102.14
Upgrade
Upgrade Firefox to a version that resolves this vulnerability.
Fixed in 116
Upgrade
Upgrade Firefox ESR to a version that resolves this vulnerability.
Fixed in 115.1
Upgrade
Upgrade Firefox ESR to a version that resolves this vulnerability.
Fixed in 102.14
Upgrade
Upgrade debian/firefox to a version that resolves this vulnerability.
Fixed in 137.0.2-1
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
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

Event History

Aug 1, 2023

CVE Published

via Mozilla·12:00 AM

CVE Published

via MITRE·02:58 PM

Data Sourced

via MITRE·02:58 PM

DescriptionWeakness

Data Sourced

03:15 PM

Description

Data Sourced

via NVD·03:15 PM

DescriptionSeverityWeaknessAffected Software

Data Sourced

via OSV·03:15 PM

DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

What is the severity of CVE-2023-4049?

The severity of CVE-2023-4049 is high.

Which software versions are affected by CVE-2023-4049?

The affected software versions are Firefox <116, Firefox ESR <102.14, and Firefox ESR <115.1.

How can I fix CVE-2023-4049?

To fix CVE-2023-4049, update to Firefox version 116 or later, Firefox ESR version 102.14 or later, or Firefox ESR version 115.1 or later.

Where can I find more information about CVE-2023-4049?

You can find more information about CVE-2023-4049 in the following references: [link1], [link2], [link3].

CVE-2023-4049: Use After Free

Other sources

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

What is the severity of CVE-2023-4049?

Which software versions are affected by CVE-2023-4049?

How can I fix CVE-2023-4049?

Where can I find more information about CVE-2023-4049?

Company

Resources

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