SB2013092304 - Information disclosure in FreeBSD

Description

This security bulletin contains information about 1 vulnerability.

1) Information disclosure (CVE-ID: CVE-2013-5666)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

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

The sendfile system-call implementation in sys/kern/uipc_syscalls.c in the kernel in FreeBSD 9.2-RC1 and 9.2-RC2 does not properly pad transmissions, which allows local users to obtain sensitive information (kernel memory) via a length greater than the length of the file.

Remediation

Install update from vendor's website.

References

• http://osvdb.org/97142
• http://svnweb.freebsd.org/base?view=revision&revision=255442
• http://www.freebsd.org/security/advisories/FreeBSD-SA-13%3a11.sendfile.asc
• http://www.securitytracker.com/id/1029013