Impact: Moderate Public Date: 2019-03-20 CWE: CWE-200 Bugzilla: 1690673: CVE-2018-18506 Mozilla: Proxy Auto-Configuration file can define localhost access to be proxied When proxy auto-detection is enabled, if a web server serves a Proxy Auto-Configuration (PAC) file or if a PAC file is loaded locally, this PAC file can specify that requests to the localhost are to be sent through the proxy to another server. This behavior is disallowed by default when a proxy is manually configured, but when enabled could allow for attacks on services and tools that bind to the localhost for networked behavior if they are accessed through browsing. This vulnerability affects Firefox < 65.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-18506 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 6.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Changed |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | None |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | thunderbird | Under investigation |
| Red Hat Enterprise Linux 7 | firefox | Affected |
| Red Hat Enterprise Linux 6 | firefox | Affected |
| Red Hat Enterprise Linux 6 | thunderbird | Under investigation |
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