CVE-2017-7761

 

Published at: - 11-06-2018 11:29

Last modified: - 24-09-2022 03:03

Total changes: - 2

Description

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.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://www.mozilla.org/security/advisories/mfsa2017-16/
• https://www.mozilla.org/security/advisories/mfsa2017-15/
• https://sourceforge.net/p/nsis/bugs/1125/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1215648
• 1038689-Third Party Advisory, VDB Entry
• 99057-Third Party Advisory, VDB Entry

 

Keywords

NVD

 

CVE-2017-7761

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures