Is CVE-2018-18506 in the CISA KEV catalog?

No. CVE-2018-18506 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-18506?

CVE-2018-18506 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2018-18506?

CVE-2018-18506 has an EPSS score of 2.18% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-18506?

Upgrade firefox on debian unstable to 65.0-1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2018-18506

MEDIUMEPSS 80th pctl

5.9

CVSS v3

NVD

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.

How to fix

Remediation Available

firefoxDebian

Fixed in:65.0-1CVE-2018-18506

firefoxUbuntu

Fixed in:65.0+build2-0ubuntu0.14.04.1USN-3874-1

Fixed in:65.0+build2-0ubuntu0.16.04.1USN-3874-1

Fixed in:65.0+build2-0ubuntu0.18.04.1USN-3874-1

thunderbirdUbuntu

Fixed in:1:60.6.1+build2-0ubuntu0.14.04.1USN-3927-1

Fixed in:1:60.6.1+build2-0ubuntu0.16.04.1USN-3927-1

Fixed in:1:60.6.1+build2-0ubuntu0.18.04.1USN-3927-1

DeveloperEditionWindows application

Affected:65.0Fixed in:65.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:65.0Fixed in:65.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

2.18%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.