Vulnerability Monitor

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CVE-2016-1885

Integer signedness error in the amd64_set_ldt function in sys/amd64/amd64/sys_machdep.c in FreeBSD 9.3 before p39, 10.1 before p31, and 10.2 before p14 allows local users to cause a denial of service (kernel panic) via an i386_set_ldt system call, which triggers a heap-based buffer overflow.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.2, requiring local system access to exploit with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 1 product from freebsd organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2016, 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

2016-04-12T02:00:06.243

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 6.2 (MEDIUM)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

6.9

Weaknesses

Type: Primary
CWE-119

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.2	Yes

References

http://packetstormsecurity.com/files/136276/FreeBSD-Kernel-amd64_set_ldt-Heap-Overflow.html Exploit ([email protected])
http://seclists.org/fulldisclosure/2016/Mar/56 ([email protected])
http://seclists.org/fulldisclosure/2016/Mar/67 ([email protected])
http://www.coresecurity.com/advisories/freebsd-kernel-amd64setldt-heap-overflow ([email protected])
http://www.securityfocus.com/archive/1/537812/100/0/threaded ([email protected])
http://www.securityfocus.com/archive/1/537813/100/0/threaded ([email protected])
http://www.securitytracker.com/id/1035309 ([email protected])
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:15.sysarch.asc Vendor Advisory ([email protected])
https://www.exploit-db.com/exploits/39570/ Exploit ([email protected])
http://packetstormsecurity.com/files/136276/FreeBSD-Kernel-amd64_set_ldt-Heap-Overflow.html Exploit (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2016/Mar/56 (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2016/Mar/67 (af854a3a-2127-422b-91ae-364da2661108)
http://www.coresecurity.com/advisories/freebsd-kernel-amd64setldt-heap-overflow (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/537812/100/0/threaded (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/537813/100/0/threaded (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1035309 (af854a3a-2127-422b-91ae-364da2661108)
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:15.sysarch.asc Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.exploit-db.com/exploits/39570/ Exploit (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 freebsd'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.