Is CVE-2018-12402 in the CISA KEV catalog?

No. CVE-2018-12402 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-12402?

CVE-2018-12402 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2018-12402?

CVE-2018-12402 has an EPSS score of 1.41% (69th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-12402?

Upgrade firefox on debian unstable to 63.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2018-12402

MEDIUM

6.5

CVSS v3

NVD

Description

The internal WebBrowserPersist code does not use correct origin context for a resource being saved. This manifests when sub-resources are loaded as part of "Save Page As..." functionality. For example, a malicious page could recover a visitor's Windows username and NTLM hash by including resources otherwise unreachable to the malicious page, if they can convince the visitor to save the complete web page. Similarly, SameSite cookies are sent on cross-origin requests when the "Save Page As..." menu item is selected to save a page, which can result in saving the wrong version of resources based on those cookies. This vulnerability affects Firefox < 63.

CWE-346

How to fix

Remediation Available

firefoxDebian

Fixed in:63.0-1CVE-2018-12402

firefoxUbuntu

Fixed in:63.0+build2-0ubuntu0.14.04.2USN-3801-1

Fixed in:63.0+build2-0ubuntu0.16.04.2USN-3801-1

Fixed in:63.0+build2-0ubuntu0.18.04.2USN-3801-1

DeveloperEditionWindows application

Affected:63.0Fixed in:63.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:63.0Fixed in:63.0Mozilla

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 ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.41%probability of exploitation in 30 days

69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Vendor Advisory3

Third-Party Advisory3

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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.