CVEvulnerability

CVE-2018-18506

5.9 MEDIUM Published 2019-02-05 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2019-02-05
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:P/A:N

Description

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.

Affected configurations

• mozilla firefox (< 65.0) • canonical ubuntu linux 14.04 • canonical ubuntu linux 16.04 • canonical ubuntu linux 18.04 • canonical ubuntu linux 18.10 • debian debian linux 8.0 • debian debian linux 9.0 • redhat enterprise linux 8.0 • redhat enterprise linux desktop 6.0 • redhat enterprise linux desktop 7.0 • redhat enterprise linux eus 8.1 • redhat enterprise linux eus 8.2 • redhat enterprise linux eus 8.4 • redhat enterprise linux eus 8.6 • redhat enterprise linux server 6.0 • redhat enterprise linux server 7.0 • redhat enterprise linux server aus 7.6 • redhat enterprise linux server aus 8.2 • redhat enterprise linux server aus 8.4 • redhat enterprise linux server aus 8.6 • redhat enterprise linux server eus 7.6 • redhat enterprise linux server tus 7.6 • redhat enterprise linux server tus 8.2 • redhat enterprise linux server tus 8.4 • redhat enterprise linux server tus 8.6 • redhat enterprise linux workstation 6.0 • redhat enterprise linux workstation 7.0 • opensuse leap 15.0 • opensuse leap 42.3

References