CVE-2017-7761

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.

CVSS v3.0 5.5 MEDIUM
CVSS v2.0 3.6 LOW

5.5^/10

CVSS v3.0 : MEDIUM

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

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

3.6^/10

CVSS v2.0 : LOW

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

Exploitability : 3.9 / Impact : 4.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.mozilla.org/security/advisories/mfsa2017-16/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-15/	Vendor Advisory
https://sourceforge.net/p/nsis/bugs/1125/	Issue Tracking Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1215648	Issue Tracking Vendor Advisory
http://www.securitytracker.com/id/1038689	Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/99057	Third Party Advisory VDB Entry

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Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:a:mozilla:firefox::::::::
	cpe:2.3:a:mozilla:firefox_esr::::::::

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

Information

Published : 2018-06-11 14:29

Updated : 2019-10-02 17:03

NVD link : CVE-2017-7761

Mitre link : CVE-2017-7761

JSON object : View

CWE

CWE-276

Incorrect Default Permissions

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Products Affected

mozilla

firefox
firefox_esr

microsoft

windows

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