CVE-2025-1017: Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7

Published Feb 4, 2025
·
Updated

Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6. 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 was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

Other sources

Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6. 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 < 135, Firefox ESR < 128.7, Thunderbird < 128.7, and Thunderbird < 135.

— Red Hat

Affected Software

22 affected componentsFixes available
Mozilla Firefox<135
135
Mozilla Firefox ESR<128.7
128.7
Mozilla Thunderbird<135
135
Mozilla Firefox<128.7.0
Mozilla Firefox<135.0
Mozilla Thunderbird>=128.0.1<128.7.0
Mozilla Thunderbird>=131.0<135.0
ubuntu/mozjs52*
ubuntu/mozjs38*
ubuntu/firefox<135.0+build2-0ubuntu0.20.04.1
135.0+build2-0ubuntu0.20.04.1
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 Thunderbird<128.7
128.7
debian/firefox
159.0-1
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~deb12u11:140.12.0esr-1~deb13u11:153.5.1esr-1~deb13u21:153.5.0esr-11:153.6.0esr-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 135
  2. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 128.7
  3. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 135
  4. Upgrade

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

    Fixed in 135.0+build2-0ubuntu0.20.04.1
  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 128.7
  7. Upgrade

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

    Fixed in 159.0-1
  8. 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
  9. 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~deb12u1Fixed in 1:140.12.0esr-1~deb13u1Fixed in 1:153.5.1esr-1~deb13u2Fixed in 1:153.5.0esr-1Fixed in 1:153.6.0esr-1
  10. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 128.7

Event History

Feb 4, 2025
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
CVE Published
via MITRE·01:58 PM
Data Sourced
via MITRE·01:58 PM
Description
Data Sourced
via NVD·02:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via Red Hat·03:01 PM
DescriptionSeverityAffected Software
Feb 6, 2025
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected 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-2025-1017?

CVE-2025-1017 has a high severity due to the potential for exploiting memory safety bugs to execute arbitrary code.

2

How do I fix CVE-2025-1017?

To fix CVE-2025-1017, update to Mozilla Firefox 135 for affected Firefox versions and Mozilla Thunderbird 128.7 or 135 for affected Thunderbird versions.

3

Which versions are affected by CVE-2025-1017?

CVE-2025-1017 affects Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6.

4

Can CVE-2025-1017 be exploited?

Yes, CVE-2025-1017 has shown evidence of memory corruption that could potentially be exploited to run arbitrary code.

5

Who is the vendor for CVE-2025-1017?

The vendor for CVE-2025-1017 is Mozilla.

Company

Resources

Contact

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