Vulnerability Monitor

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CVE-2015-5965

The SSL-VPN feature in Fortinet FortiOS before 4.3.13 only checks the first byte of the TLS MAC in finished messages, which makes it easier for remote attackers to spoof encrypted content via a crafted MAC field.

Security Impact Summary

CVE-2015-5965 is a security vulnerability that . Impacting 1 product from fortinet 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

2015-08-11T14:59:16.477

Last Modified

2026-06-17T00:30:12.030

Status

Modified

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

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

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

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	fortinet	fortios	≤ 4.3.12	Yes

References

http://www.fortiguard.com/advisory/FG-IR-15-016/ Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/76065 ([email protected])
http://www.securitytracker.com/id/1033256 ([email protected])
https://security.gentoo.org/glsa/201508-01 ([email protected])
https://vivaldi.net/en-US/blogs/entry/the-poodle-has-friends ([email protected])
http://www.fortiguard.com/advisory/FG-IR-15-016/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/76065 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1033256 (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201508-01 (af854a3a-2127-422b-91ae-364da2661108)
https://vivaldi.net/en-US/blogs/entry/the-poodle-has-friends (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 fortinet'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.