CVE-2019-11736

The Mozilla Maintenance Service does not guard against files being hardlinked to another file in the updates directory, allowing for the replacement of local files, including the Maintenance Service executable, which is run with privileged access. Additionally, there was a race condition during checks for junctions and symbolic links by the Maintenance Service, allowing for potential local file and directory manipulation to be undetected in some circumstances. This allows for potential privilege escalation by a user with unprivileged local access. <br>*Note: These attacks requires local system access and only affects Windows. Other operating systems are not affected.*. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

• CWE-362

• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
• https://bugzilla.mozilla.org/show_bug.cgi?id=1551913Issue Tracking, Permissions Required, Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1552206Issue Tracking, Permissions Required, Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-25/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-26/Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
• https://bugzilla.mozilla.org/show_bug.cgi?id=1551913Issue Tracking, Permissions Required, Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1552206Issue Tracking, Permissions Required, Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-25/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-26/Vendor Advisory

Published

Sep 27, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2019-11729Empty or malformed p256-ECDH public keys may trigger a segme…
• CVE-2019-1173An elevation of privilege vulnerability exists in the way th…7
• CVE-2019-11730A vulnerability exists where if a user opens a locally saved…6.5
• CVE-2019-11733When a master password is set, it is required to be entered …9.8
• CVE-2019-11734Mozilla developers and community members reported memory saf…9.8
• CVE-2019-11735Mozilla developers and community members reported memory saf…8.8
• CVE-2019-11737If a wildcard ('*') is specified for the host in Content Sec…5.3
• CVE-2019-11738If a Content Security Policy (CSP) directive is defined that…6.3
• CVE-2019-11739Encrypted S/MIME parts in a crafted multipart/alternative me…6.5
• CVE-2019-1174An elevation of privilege vulnerability exists in the way th…7
• CVE-2019-11740Mozilla developers and community members reported memory saf…8.8
• CVE-2019-11741A compromised sandboxed content process can perform a Univer…6.1