----------------------------------------------------------------------

Secunia Network Software Inspector 2.0 (NSI) - Public Beta

The Public Beta has ended. Thanks to all that participated.

Learn more:
http://secunia.com/network_software_inspector_2/

----------------------------------------------------------------------

TITLE:
PHP Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA30048

VERIFY ADVISORY:
http://secunia.com/advisories/30048/

CRITICAL:
Moderately critical

IMPACT:
Unknown, Security Bypass, DoS, System access

WHERE:
>From remote

REVISION:
1.1 originally posted 2008-05-02

SOFTWARE:
PHP 5.2.x
http://secunia.com/product/13446/

DESCRIPTION:
Some vulnerabilities have been reported in PHP, where some have
unknown impacts and others can be exploited by malicious users to
bypass certain security restrictions, and potentially by malicious
people to cause a DoS (Denial of Service) or to compromise a
vulnerable system.

1) An unspecified error in the FastCGI SAPI can be exploited to cause
a stack-based buffer overflow.

2) An error in the processing of multibyte characters within the
"escapeshellcmd()" and "escapeshellarg()" functions can be exploited
to escape the inserted backslash or quote characters via certain
multibyte characters.

Successful exploitation allows to bypass the "safe_mode_exec_dir" and
"disable_functions" directives, and potentially to inject arbitrary
shell commands via user controlled input, but requires that the shell
uses a locale with a variable width character (e.g. GBK, EUC-KR,
SJIS).

3) A vulnerability is caused due to an error during path translation
in cgi_main.c. This can potentially be exploited to execute arbitrary
code, but depends on how a targeted application is using PHP.

4) An error in cURL can be exploited to bypass the "safe_mode"
directive.

5) A boundary error in PCRE can potentially be exploited by malicious
people to cause a DoS or compromise a vulnerable system.

For more information:
SA28923

NOTE: A weakness in the "GENERATE_SEED()" macro has also been
reported.

The vulnerabilities are reported in versions prior to 5.2.6.

SOLUTION:
Update to version 5.2.6.
http://www.php.net/downloads.php

PROVIDED AND/OR DISCOVERED BY:
1) The vendor credits Andrei Nigmatulin.
2) Stefan Esser.
3) The vendor credits Ryan Permeh.
4) The vendor credits Maksymilian Arciemowicz.

CHANGELOG:
2008-05-07: Updated "Description" and "Original Advisory" section
with additional information. Added CVE references and link to
US-CERT.

ORIGINAL ADVISORY:
PHP:
http://www.php.net/ChangeLog-5.php

Stefan Esser:
http://www.sektioneins.de/advisories/SE-2008-03.txt
http://www.sektioneins.de/advisories/SE-2008-02.txt

OTHER REFERENCES:
SA28923:
http://secunia.com/advisories/28923/

US-CERT VU#147027:
http://www.kb.cert.org/vuls/id/147027

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org

----------------------------------------------------------------------