Medium severity · published Sep 27, 2019
CVE-2019-11738
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
6.3
CVSS
1.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 69.0 · source: NVD
FE
Firefox Esr · Mozilla
before 68.1.0 · source: NVD
LE
Leap · Opensuse
15.0; 15.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-11738
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-11738
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
Exploit
https://bugzilla.mozilla.org/show_bug.cgi?id=1452037
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-25/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-26/
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