FreeBSD : FreeBSD -- Kernel data leak via ptrace(PT_LWPINFO) (34a3f9b5-dab3-11e7-b5af-a4badb2f4699)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

Not all information in the struct ptrace_lwpinfo is relevant for the
state of any thread, and the kernel does not fill the irrelevant bytes
or short strings. Since the structure filled by the kernel is
allocated on the kernel stack and copied to userspace, a leak of
information of the kernel stack of the thread is possible from the
debugger. Impact : Some bytes from the kernel stack of the thread
using ptrace(PT_LWPINFO) call can be observed in userspace.

See also :

http://www.nessus.org/u?b80da790

Solution :

Update the affected packages.

Risk factor :

Low / CVSS Base Score : 2.1
(CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N)

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 105064 ()

Bugtraq ID:

CVE ID: CVE-2017-1086

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