SB2016052502 - Heap-based buffer overflow in FreeBSD

Description

This security bulletin contains information about 1 security vulnerability.

1) Heap-based buffer overflow (CVE-ID: CVE-2016-1887)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Integer signedness error in the sockargs function in sys/kern/uipc_syscalls.c in FreeBSD 10.1 before p34, 10.2 before p17, and 10.3 before p3. A remote attacker can use a negative buflen argument to trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• http://cturt.github.io/sendmsg.html
• http://www.securitytracker.com/id/1035906
• https://security.FreeBSD.org/advisories/FreeBSD-SA-16:19.sendmsg.asc