CVE-2019-11738

Public Exploit

Description

If a Content Security Policy (CSP) directive is defined that uses a hash-based source that takes the empty string as input, execution of any javascript: URIs will be allowed. This could allow for malicious JavaScript content to be run, bypassing CSP permissions. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

6.3

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.58%

Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org

Affected: Mozilla Firefox

Affected: Mozilla Firefox ESR

References

Link	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1452037	issue tracking exploit vendor advisory
https://www.mozilla.org/security/advisories/mfsa2019-25/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2019-26/	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html	mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html	mailing list third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-11738?: CVE-2019-11738 has been scored as a medium severity vulnerability.
How to fix CVE-2019-11738?: To fix CVE-2019-11738, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11738 being actively exploited in the wild?: It is possible that CVE-2019-11738 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-11738?: CVE-2019-11738 affects Mozilla Firefox, Mozilla Firefox ESR.

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