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TITLE:
PHP Two Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA43328

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43328/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43328

RELEASE DATE:
2011-02-17

DISCUSS ADVISORY:
http://secunia.com/advisories/43328/#comments

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

http://secunia.com/advisories/43328/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=43328

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:
Some vulnerabilities have been discovered in PHP, which can be
exploited by malicious people to cause a DoS (Denial of Service).

1) A NULL pointer dereference error within the "_zip_name_locate()"
function in ext/zip/lib/zip_name_locate.c and can be exploited to
cause a crash when performing certain actions using the "ZipArchive"
class on specially crafted archives.

Successful exploitation requires that the "ZIPARCHIVE::FL_UNCHANGED"
option is used.

2) An error within the "exif_process_IFD_TAG()" function in
ext/exif/exif.c can be exploited to cause a crash when processing
malformed IFD (Image File Descriptor) tags in images with specially
crafted EXIF information.

Successful exploitation requires a 64bit system and may also require
that a large (> 4 GiB) or no memory limit is set via the PHP
"memory_limit" setting.

The vulnerabilities are confirmed in version 5.3.5. Other versions
may also be affected.

SOLUTION:
Fixed in the SVN repository.

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

PROVIDED AND/OR DISCOVERED BY:
1) Maksymilian Arciemowicz
2) Luca Carettoni

ORIGINAL ADVISORY:
1) http://bugs.php.net/bug.php?id=53885
2) http://www.openwall.com/lists/oss-security/2011/02/14/1

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

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