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ubuntucveUbuntu.comUB:CVE-2018-18506
HistoryJan 30, 2019 - 12:00 a.m.

CVE-2018-18506

2019-01-3000:00:00
ubuntu.com
ubuntu.com
23
web server
proxy auto-configuration
security flaw
network behavior
software vulnerability
localhost

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

0.002

Percentile

62.4%

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.

Notes

Author Note
tyhicks mozjs contains a copy of the SpiderMonkey JavaScript engine
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchfirefox< 65.0+build2-0ubuntu0.18.04.1UNKNOWN
ubuntu18.10noarchfirefox< 65.0+build2-0ubuntu0.18.10.1UNKNOWN
ubuntu19.04noarchfirefox< 65.0+build2-0ubuntu1UNKNOWN
ubuntu19.10noarchfirefox< 65.0+build2-0ubuntu1UNKNOWN
ubuntu20.04noarchfirefox< 65.0+build2-0ubuntu1UNKNOWN
ubuntu20.10noarchfirefox< 65.0+build2-0ubuntu1UNKNOWN
ubuntu21.04noarchfirefox< 65.0+build2-0ubuntu1UNKNOWN
ubuntu21.10noarchfirefox< 65.0+build2-0ubuntu1UNKNOWN
ubuntu22.04noarchfirefox< 65.0+build2-0ubuntu1UNKNOWN
ubuntu22.10noarchfirefox< 65.0+build2-0ubuntu1UNKNOWN
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CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

0.002

Percentile

62.4%