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TITLE:
PHP "spl_object_storage_attach()" Use-After-Free Vulnerability

SECUNIA ADVISORY ID:
SA40268

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40268/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40268

RELEASE DATE:
2010-06-29

DISCUSS ADVISORY:
http://secunia.com/advisories/40268/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
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 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/40268/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=40268

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Stefan Esser has reported a vulnerability in PHP, which can be
exploited by malicious people to disclose potentially sensitive
information and compromise a vulnerable system.

The vulnerability is caused due to a use-after-free error within the
"spl_object_storage_attach()" function, which can be exploited by
e.g. inserting the same object twice.

In PHP 5.2.x, this is reportedly only exploitable on 32bit systems.

The vulnerability is reported in version 5.2.13 and 5.3.2. Other
versions may also be affected.

SOLUTION:
Do not process untrusted data using the "unserialize()" function.

PROVIDED AND/OR DISCOVERED BY:
Stefan Esser

ORIGINAL ADVISORY:
http://php-security.org/2010/06/25/mops-2010-061-php-splobjectstorage-deserialization-use-after-free-vulnerability/

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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About:
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