Vulnerability · Published Oct 1, 2020 · Assigned by mozilla

CVE-2020-15664

Medium 6.5

In plain English

A medium-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.4%top 27.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, Firefox ESR < 78.2, and Firefox for Android < 80.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20firefox80.0-r0ALPINE-CVE-2020-15664
Alpine:v3.21firefox80.0-r0ALPINE-CVE-2020-15664
Alpine:v3.22firefox80.0-r0ALPINE-CVE-2020-15664
Alpine:v3.23firefox80.0-r0ALPINE-CVE-2020-15664
Alpine:v3.20firefox-esr78.2.0-r0ALPINE-CVE-2020-15664
Alpine:v3.21firefox-esr78.2.0-r0ALPINE-CVE-2020-15664
Alpine:v3.22firefox-esr78.2.0-r0ALPINE-CVE-2020-15664
Alpine:v3.23firefox-esr78.2.0-r0ALPINE-CVE-2020-15664
Alpine:v3.21librewolf80.0-r0ALPINE-CVE-2020-15664
Alpine:v3.22librewolf80.0-r0ALPINE-CVE-2020-15664
Alpine:v3.23librewolf80.0-r0ALPINE-CVE-2020-15664
Alpine:v3.24librewolf80.0-r0ALPINE-CVE-2020-15664
Debian:12firefox-esr68.12.0esr-1DEBIAN-CVE-2020-15664
Debian:13firefox-esr68.12.0esr-1DEBIAN-CVE-2020-15664
Debian:14firefox-esr68.12.0esr-1DEBIAN-CVE-2020-15664
Debian:12thunderbird1:68.12.0-1DEBIAN-CVE-2020-15664
Debian:13thunderbird1:68.12.0-1DEBIAN-CVE-2020-15664
Debian:14thunderbird1:68.12.0-1DEBIAN-CVE-2020-15664

Affected products (as reported)

VendorProductVersions
Mozilla Firefox unspecified – before 80
Mozilla Thunderbird unspecified – before 78.2unspecified – before 68.12
Mozilla Firefox ESR unspecified – before 68.12unspecified – before 78.2
Mozilla Firefox for Android unspecified – before 80

References