Privilege escalation in the DLL Services component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 159, Firefox ESR 153.6, Thunderbird 159, Thunderbird 153.6, Firefox 157, and Firefox ESR 140.17.
Weakness
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | * | 140.17.0 (excluding) |
| Firefox | Mozilla | 141.0 (including) | 153.4.0 (excluding) |
| Firefox | Mozilla | 154.0.0 (including) | 157.0.0 (excluding) |
| Thunderbird | Mozilla | * | 140.17.0 (excluding) |
| Thunderbird | Mozilla | 141.0 (including) | 153.4.0 (excluding) |
| Thunderbird | Mozilla | 154.0 (including) | 157.0 (excluding) |
| Red Hat Enterprise Linux 10 | RedHat | firefox-0:140.17.0-1.el10_2 | * |
| Red Hat Enterprise Linux 10 | RedHat | thunderbird-0:140.17.0-1.el10_2 | * |
| Red Hat Enterprise Linux 10.0 Extended Update Support | RedHat | thunderbird-0:140.17.0-1.el10_0 | * |
| Red Hat Enterprise Linux 8 | RedHat | firefox-0:140.17.0-1.el8_10 | * |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | RedHat | thunderbird-0:140.17.0-1.el8_4 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | RedHat | thunderbird-0:140.17.0-1.el8_4 | * |
| Red Hat Enterprise Linux 9 | RedHat | firefox-0:140.17.0-1.el9_8 | * |
| Red Hat Enterprise Linux 9 | RedHat | thunderbird-0:140.17.0-1.el9_8 | * |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | RedHat | thunderbird-0:140.17.0-1.el9_2 | * |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | RedHat | thunderbird-0:140.17.0-1.el9_4 | * |
| Red Hat Enterprise Linux 9.6 Extended Update Support | RedHat | thunderbird-0:140.17.0-1.el9_6 | * |
| Mozjs102 | Ubuntu | esm-apps/noble | * |
| Mozjs102 | Ubuntu | jammy | * |
| Mozjs102 | Ubuntu | noble | * |
| Mozjs115 | Ubuntu | noble | * |
| Mozjs52 | Ubuntu | esm-apps/focal | * |
| Mozjs52 | Ubuntu | esm-infra/bionic | * |
| Mozjs68 | Ubuntu | esm-infra/focal | * |
| Mozjs78 | Ubuntu | esm-apps/jammy | * |
| Mozjs78 | Ubuntu | jammy | * |
| Mozjs91 | Ubuntu | jammy | * |
| Thunderbird | Ubuntu | jammy | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/122.html
- https://cwe.mitre.org/data/definitions/233.html
- https://cwe.mitre.org/data/definitions/58.html
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2057112
- https://www.mozilla.org/security/advisories/mfsa2026-100/
- https://www.mozilla.org/security/advisories/mfsa2026-101/
- https://www.mozilla.org/security/advisories/mfsa2026-102/
- https://www.mozilla.org/security/advisories/mfsa2026-103/
- https://www.mozilla.org/security/advisories/mfsa2026-118/
- https://www.mozilla.org/security/advisories/mfsa2026-120/
- https://www.mozilla.org/security/advisories/mfsa2026-121/
- https://www.mozilla.org/security/advisories/mfsa2026-122/
- https://www.mozilla.org/security/advisories/mfsa2026-97/
- https://www.mozilla.org/security/advisories/mfsa2026-99/