CVE-2017-7761

2018-06-1100:00:00

ubuntu.com

CVSS2

3.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS

0.001

Percentile

25.0%

JSON

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.