CVE-2025-0238: Use-after-free when breaking lines in text

Published Jan 7, 2025
·
Updated

Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 134, and Thunderbird 128.6.

Other sources

Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, and Firefox ESR < 115.19.

— Red Hat

Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Firefox ESR < 115.19, Thunderbird < 134, and Thunderbird < 128.6.

— OSV

Affected Software

24 affected componentsFixes available
Mozilla Thunderbird<134
134
Mozilla Firefox ESR<115.19
115.19
Mozilla Firefox ESR<128.6
128.6
Mozilla Firefox<115.19.0
Mozilla Firefox<134.0
Mozilla Firefox>=116.0<128.6.0
Mozilla Thunderbird<128.6
Mozilla Thunderbird>=129.0<134.0
ubuntu/mozjs52*
ubuntu/mozjs38*
ubuntu/firefox<134.0+build1-0ubuntu0.20.04.1
134.0+build1-0ubuntu0.20.04.1
ubuntu/mozjs68*
ubuntu/mozjs52*
ubuntu/mozjs102*
ubuntu/mozjs78*
ubuntu/mozjs91*
ubuntu/thunderbird<1:128.12.0+build1-0ubuntu0.22.04.1
1:128.12.0+build1-0ubuntu0.22.04.1
ubuntu/mozjs102*
ubuntu/mozjs115*
Mozilla Firefox<134
134
Mozilla Thunderbird<128.6
128.6
debian/firefox
159.0.1-1
debian/firefox-esr
140.12.0esr-1~deb12u1153.6.0esr-1~deb12u2140.15.0esr-1~deb13u1153.6.0esr-1~deb13u1153.5.1esr-1153.6.0esr-1
debian/thunderbird
1:140.12.0esr-1~deb12u11:153.6.0esr-1~deb12u21:140.12.0esr-1~deb13u11:153.6.0esr-1~deb13u11:153.5.0esr-11:153.6.0esr-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 134
  2. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 115.19
  3. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 128.6
  4. Upgrade

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

    Fixed in 134.0+build1-0ubuntu0.20.04.1
  5. Upgrade

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

    Fixed in 1:128.12.0+build1-0ubuntu0.22.04.1
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 134
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 128.6
  8. Upgrade

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

    Fixed in 159.0.1-1
  9. Upgrade

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

    Fixed in 140.12.0esr-1~deb12u1Fixed in 153.6.0esr-1~deb12u2Fixed in 140.15.0esr-1~deb13u1Fixed in 153.6.0esr-1~deb13u1Fixed in 153.5.1esr-1Fixed in 153.6.0esr-1
  10. Upgrade

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

    Fixed in 1:140.12.0esr-1~deb12u1Fixed in 1:153.6.0esr-1~deb12u2Fixed in 1:140.12.0esr-1~deb13u1Fixed in 1:153.6.0esr-1~deb13u1Fixed in 1:153.5.0esr-1Fixed in 1:153.6.0esr-1
  11. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 134
  12. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 128.6

Event History

Jan 7, 2025
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·04:07 PM
Data Sourced
via MITRE·04:07 PM
Description
Data Sourced
via OSV·04:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·04:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via Red Hat·05:01 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 the severity of CVE-2025-0238?

CVE-2025-0238 is classified as a potentially exploitable vulnerability due to its use-after-free condition.

2

How do I fix CVE-2025-0238?

To remediate CVE-2025-0238, update affected Mozilla products to versions 134.0 or 128.6 and ensure all security patches are applied.

3

Which software is affected by CVE-2025-0238?

CVE-2025-0238 affects Mozilla Firefox ESR, Mozilla Firefox, and Mozilla Thunderbird versions prior to the specified remedial versions.

4

What are the potential impacts of CVE-2025-0238?

Exploitation of CVE-2025-0238 may result in application crashes and could allow an attacker to execute arbitrary code.

5

Can CVE-2025-0238 be exploited remotely?

Yes, CVE-2025-0238 can potentially be exploited remotely through controlled failed memory allocations.

Company

Resources

Contact

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