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CVE
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CVE-2017-7761Date: (C)2018-06-14   (M)2024-03-27


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 Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 5.5CVSS Score : 3.6
Exploit Score: 1.8Exploit Score: 3.9
Impact Score: 3.6Impact Score: 4.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: LOWAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: PARTIAL
Confidentiality: NONEAvailability: PARTIAL
Integrity: HIGH 
Availability: NONE 
  
Reference:
SECTRACK-1038689
BID-99057
https://bugzilla.mozilla.org/show_bug.cgi?id=1215648
https://sourceforge.net/p/nsis/bugs/1125/
https://www.mozilla.org/security/advisories/mfsa2017-15/
https://www.mozilla.org/security/advisories/mfsa2017-16/

CPE    323
cpe:/a:mozilla:firefox:37.0
cpe:/a:mozilla:firefox:14.0
cpe:/a:mozilla:firefox_esr:17.0.10
cpe:/a:mozilla:firefox_esr:38.0
...
CWE    1
CWE-276
OVAL    6
oval:org.secpod.oval:def:2101306
oval:org.secpod.oval:def:41102
oval:org.secpod.oval:def:89044872
oval:org.secpod.oval:def:89044698
...

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