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. External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2019-08/#CVE-2018-18506
Acknowledgments: Name: the Mozilla project Upstream: Jann Horn
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2019:0622 https://access.redhat.com/errata/RHSA-2019:0622
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2019:0623 https://access.redhat.com/errata/RHSA-2019:0623
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2019:0680 https://access.redhat.com/errata/RHSA-2019:0680
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2019:0681 https://access.redhat.com/errata/RHSA-2019:0681
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2019:0966 https://access.redhat.com/errata/RHSA-2019:0966
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2019:1144 https://access.redhat.com/errata/RHSA-2019:1144