Vulnerability Monitor

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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, which might make it easier for remote attackers to conduct cross-site scripting (XSS) attacks by leveraging unexpected policy-enforcement behavior.

Security Impact Summary

CVE-2015-4490 is a security vulnerability that . Impacting 4 products from mozilla, from canonical, from opensuse and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2015, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2015-08-16T01:59:18.080

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 4.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-79

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	≤ 39.0.3	Yes
Operating System	canonical	ubuntu_linux	12.04	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	15.04	Yes
Operating System	opensuse	opensuse	13.1	Yes
Operating System	opensuse	opensuse	13.2	Yes
Operating System	oracle	solaris	11.3	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html Third Party Advisory ([email protected])
http://www.mozilla.org/security/announce/2015/mfsa2015-91.html Vendor Advisory ([email protected])
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory ([email protected])
http://www.securitytracker.com/id/1033247 ([email protected])
http://www.ubuntu.com/usn/USN-2702-1 Third Party Advisory ([email protected])
http://www.ubuntu.com/usn/USN-2702-2 Third Party Advisory ([email protected])
http://www.ubuntu.com/usn/USN-2702-3 ([email protected])
https://bugzilla.mozilla.org/show_bug.cgi?id=1086999 Issue Tracking ([email protected])
https://security.gentoo.org/glsa/201605-06 ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.mozilla.org/security/announce/2015/mfsa2015-91.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1033247 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-2702-1 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-2702-2 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-2702-3 (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.mozilla.org/show_bug.cgi?id=1086999 Issue Tracking (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201605-06 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For mozilla's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.