FreeBSD : p7zip -- out-of-bounds read vulnerability (d706a3a3-4a7c-11e6-97f7-5453ed2e2b49)

This script is Copyright (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing a security-related update.

Description :

Cisco Talos reports :

An out-of-bounds read vulnerability exists in the way 7-Zip handles
Universal Disk Format (UDF) files.

Central to 7-Zip's processing of UDF files is the
CInArchive::ReadFileItem method. Because volumes can have more than
one partition map, their objects are kept in an object vector. To
start looking for an item, this method tries to reference the proper
object using the partition map's object vector and the
'PartitionRef' field from the Long Allocation Descriptor. Lack of
checking whether the 'PartitionRef' field is bigger than the available
amount of partition map objects causes a read out-of-bounds and can
lead, in some circumstances, to arbitrary code execution.

See also :

http://blog.talosintel.com/2016/05/multiple-7-zip-vulnerabilities.html
http://www.nessus.org/u?e6157f5d

Solution :

Update the affected package.

Risk factor :

Medium / CVSS Base Score : 6.8
(CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P)

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 92346 ()

Bugtraq ID:

CVE ID: CVE-2016-2335

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