FreeBSD : php -- memory_limit related vulnerability (dd7aa4f1-102f-11d9-8a8a-000c41e2cdad)

This script is Copyright (C) 2005-2013 Tenable Network Security, Inc.


Synopsis :

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

Description :

Stefan Esser of e-matters discovered a condition within PHP that may
lead to remote execution of arbitrary code. The memory_limit facility
is used to notify functions when memory contraints have been met.
Under certain conditions, the entry into this facility is able to
interrupt functions such as zend_hash_init() at locations not suitable
for interruption. The result would leave these functions in a
vulnerable state.

An attacker that is able to trigger the memory_limit abort within
zend_hash_init() and is additionally able to control the heap before
the HashTable itself is allocated, is able to supply his own HashTable
destructor pointer. [...]

All mentioned places outside of the extensions are quite easy to
exploit, because the memory allocation up to those places is
deterministic and quite static throughout different PHP versions.
[...]

Because the exploit itself consist of supplying an arbitrary
destructor pointer this bug is exploitable on any platform.

See also :

http://marc.info/?l=bugtraq&m=108981780109154
http://www.nessus.org/u?83c215d0
http://www.nessus.org/u?bbb03f70

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.1
(CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 4.2
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 19143 (freebsd_pkg_dd7aa4f1102f11d98a8a000c41e2cdad.nasl)

Bugtraq ID: 10725

CVE ID: CVE-2004-0594

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