Description
During the initialization of a new content process, a pointer offset can be manipulated leading to memory corruption and a potentially exploitable crash in the parent process. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox ESR | before 68.4 | — |
| Mozilla | Firefox | before 72 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | mozjs52 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | MozillaFirefox +1 | 68.4.1-3.66.1 | SUSE-SU-2020:0142-1, SUSE-SU-2020:0078-1 |
| SLES 15 | MozillaFirefox +1 | 68.4.1-3.66.1 | SUSE-SU-2020:0142-1, SUSE-SU-2020:0078-1 |
| SLES 12 SP5 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SLES 12 SP4 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SLES 12 SP3 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SLES 12 SP1 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SLES 11 SP4 | MozillaFirefox | 68.4.1-78.57.1 | SUSE-SU-2020:14268-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SLES for SAP 12 SP3 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SUSE OpenStack Cloud Crowbar 8 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SUSE OpenStack Cloud 8 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SUSE OpenStack Cloud 7 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SUSE HPE Helion OpenStack 8 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
| SUSE Enterprise Storage 5 | MozillaFirefox | 68.4.1-109.101.1 | SUSE-SU-2020:0068-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaThunderbird | 91.1.1-1.1 | openSUSE-SU-2024:10601-1 |
| openSUSE Leap 15.1 | MozillaFirefox | 68.4.1-lp151.2.24.1 | openSUSE-SU-2020:0060-1 |
| openSUSE Leap 15.1 | MozillaThunderbird | 68.4.1-lp151.2.22.2 | openSUSE-SU-2020:0094-1 |
Advisories 7
- openSUSE-SU-2020:0094-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0078-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0060-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0068-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0142-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:14268-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10601-1 MozillaThunderbird-91.1.1-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1599005
- https://www.mozilla.org/security/advisories/mfsa2020-01/
- https://www.mozilla.org/security/advisories/mfsa2020-02/
- 20200112 [slackware-security] mozilla-thunderbird (SSA:2020-010-01) mailing-list
- http://packetstormsecurity.com/files/155912/Slackware-Security-Advisory-mozilla-thunderbird-Updates.html
- openSUSE-SU-2020:0060 vendor-advisory
- openSUSE-SU-2020:0094 vendor-advisory