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CVE-2017-5397
CRITICAL
The cache directory on the local file system is set to be world writable. Firefox defaults to extracting libraries from this cache. This allows for the possibility of an installed malicious application or tools with write access to the file system to replace files used by Firefox with their own versions. This vulnerability affects Firefox < 51.0.3.
Published: Jun 11, 2018
Modified: Jun 17, 2026
CWE-829
CVSS Metrics
CVSSv3
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products (1)
| Vendor | Product | Version |
|---|---|---|
| mozilla | firefox | * < 51.0.3 |
GitHub Security Advisory GHSA-5h8g-78mr-f4g5
The cache directory on the local file system is set to be world writable. Firefox defaults to...
References (6)
- http://www.securityfocus.com/bid/96144 Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1337304 Issue Tracking, Patch, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-04/ Vendor Advisory
- http://www.securityfocus.com/bid/96144 Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1337304 Issue Tracking, Patch, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-04/ Vendor Advisory
Risk Scores
CVSS Score
9.8 / 10
EPSS Score
3.21%
Top 13% most likely to be exploited
Threat Score
40.2 / 100
Data Sources
NVD
EPSS
GitHub