CVE-2015-4490
The nsCSPHostSrc::permits function in dom/security/nsCSPUtils.cpp in Mozilla Firefox before 40.0 does not implement the Content Security Policy Level 2 exceptions for the blob, data, and filesystem URL schemes during wildcard source-expression matching,…
Does this matter?
Lower severity and a low EPSS score (2.95%). Track it; it rarely justifies an emergency change on its own.
Description
The nsCSPHostSrc::permits function in dom/security/nsCSPUtils.cpp in Mozilla Firefox before 40.0 does not implement the Content Security Policy Level 2 exceptions for the blob, data, and filesystem URL schemes during wildcard source-expression matching, which might make it easier for remote attackers to conduct cross-site scripting (XSS) attacks by leveraging unexpected policy-enforcement behavior.
- CVSS 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
- EPSS
- 2.95% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- mozilla/firefox · canonical/ubuntu linux · opensuse/opensuse · oracle/solaris
- Source
- security@mozilla.org
References
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.htmlThird Party Advisory
- http://www.mozilla.org/security/announce/2015/mfsa2015-91.htmlVendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlThird Party Advisory
- http://www.securitytracker.com/id/1033247
- http://www.ubuntu.com/usn/USN-2702-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2702-2Third Party Advisory
- http://www.ubuntu.com/usn/USN-2702-3
- https://bugzilla.mozilla.org/show_bug.cgi?id=1086999Issue Tracking
- https://security.gentoo.org/glsa/201605-06
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.htmlThird Party Advisory
- http://www.mozilla.org/security/announce/2015/mfsa2015-91.htmlVendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlThird Party Advisory
- http://www.securitytracker.com/id/1033247
- http://www.ubuntu.com/usn/USN-2702-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2702-2Third Party Advisory
- http://www.ubuntu.com/usn/USN-2702-3
- https://bugzilla.mozilla.org/show_bug.cgi?id=1086999Issue Tracking
- https://security.gentoo.org/glsa/201605-06
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.