Vulnerability Monitor

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CVE-2015-4503

The TCP Socket API implementation in Mozilla Firefox before 41.0 mishandles array boundaries that were established with a navigator.mozTCPSocket.open method call and send method calls, which allows remote TCP servers to obtain sensitive information from process memory by reading packet data, as demonstrated by availability of this API in a Firefox OS application.

Security Impact Summary

CVE-2015-4503 is a security vulnerability that . Impacting 1 product from mozilla 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

2015-09-24T04:59:06.160

Last Modified

2026-05-06T22:30:45.220

Status

Modified

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

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

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

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-200

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	≤ 40.0.3	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00000.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00005.html ([email protected])
http://www.mozilla.org/security/announce/2015/mfsa2015-97.html Vendor Advisory ([email protected])
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html ([email protected])
http://www.securityfocus.com/bid/76815 ([email protected])
http://www.securitytracker.com/id/1033640 ([email protected])
https://bugzilla.mozilla.org/show_bug.cgi?id=994337 ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00000.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00005.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.mozilla.org/security/announce/2015/mfsa2015-97.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/76815 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1033640 (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.mozilla.org/show_bug.cgi?id=994337 (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.