Privilege Escalation Vulnerability in Mozilla Maintenance Service

CVE-2017-7761 · LOW Severity

AV:L/AC:L/AU:N/C:N/I:P/A:P

The Mozilla Maintenance Service "helper.exe" application creates a temporary directory writable by non-privileged users. When this is combined with creation of a junction (a form of symbolic link), protected files in the target directory of the junction can be deleted by the Mozilla Maintenance Service, which has privileged access. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 52.2 and Firefox < 54.

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