Input validation error in FreeBSD

Published: 2013-11-21 | Updated: 2020-08-10
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2013-6833
Exploitation vector Network
Public exploit N/A
Vulnerable software
Operating systems & Components / Operating system

Vendor FreeBSD Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU42345

Risk: Medium


CVE-ID: CVE-2013-6833

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No


The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The qls_eioctl function in sys/dev/qlxge/qls_ioctl.c in the kernel in FreeBSD 10 and earlier does not validate a certain size parameter, which allows local users to obtain sensitive information from kernel memory via a crafted ioctl call.


Install update from vendor's website.

Vulnerable software versions

FreeBSD: 0.4_1 - 9.2

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?