Vulnerability CVE-2016-1885
Published: 2016-04-11   Modified: 2016-04-12

Description:
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.

See advisories in our WLB2 database:
Topic
Author
Date
High
FreeBSD Kernel amd64_set_ldt Heap Overflow
CORE
17.03.2016

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.9/10
6.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Freebsd -> Freebsd 

 References:
http://packetstormsecurity.com/files/136276/FreeBSD-Kernel-amd64_set_ldt-Heap-Overflow.html
http://seclists.org/fulldisclosure/2016/Mar/56
http://seclists.org/fulldisclosure/2016/Mar/67
http://www.coresecurity.com/advisories/freebsd-kernel-amd64setldt-heap-overflow
http://www.securityfocus.com/archive/1/537812/100/0/threaded
http://www.securityfocus.com/archive/1/537813/100/0/threaded
http://www.securitytracker.com/id/1035309
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:15.sysarch.asc
https://www.exploit-db.com/exploits/39570/
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