CVE-2018-18506

MEDIUM

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.

References

http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00035.html

http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00043.html

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00023.html

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00043.html

http://www.securityfocus.com/bid/106773

https://access.redhat.com/errata/RHSA-2019:0622

https://access.redhat.com/errata/RHSA-2019:0623

https://access.redhat.com/errata/RHSA-2019:0680

https://access.redhat.com/errata/RHSA-2019:0681

https://access.redhat.com/errata/RHSA-2019:0966

https://access.redhat.com/errata/RHSA-2019:1144

https://lists.debian.org/debian-lts-announce/2019/03/msg00024.html

https://lists.debian.org/debian-lts-announce/2019/04/msg00000.html

https://seclists.org/bugtraq/2019/Apr/0

https://seclists.org/bugtraq/2019/Mar/28

https://security.gentoo.org/glsa/201904-07

https://usn.ubuntu.com/3874-1/

https://usn.ubuntu.com/3927-1/

https://www.debian.org/security/2019/dsa-4411

https://www.debian.org/security/2019/dsa-4420

https://www.mozilla.org/security/advisories/mfsa2019-01/

Details

Source: MITRE

Published: 2019-02-05

Updated: 2019-05-13

Type: CWE-254

Risk Information

CVSS v2.0

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3.0

Base Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Impact Score: 3.6

Exploitability Score: 2.2

Severity: MEDIUM