Bug 2170761 (CVE-2023-0662)

Summary: CVE-2023-0662 php: DoS vulnerability when parsing multipart request body
Product: [Other] Security Response Reporter: Sandipan Roy <saroy>
Component: vulnerabilityAssignee: Nobody <nobody>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: hhorak, jcadmus, jorton, kyoshida, rcollet
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A vulnerability was found in PHP. This security flaw occurs when the request body parsing in PHP allows any unauthenticated attacker to consume a large amount of CPU time and trigger excessive logging. A large amount of CPU time required for processing requests can block all available worker processes and significantly delay or slow the processing of legitimate user requests. The large volume of warning messages can wear down the disk and fill it up. A complete denial of service is achievable by sending many concurrent multipart requests in a loop. PHP parses the request body before invoking any application scripts. This vulnerability affects all PHP websites that accept POST request bodies (post_max_size set to a value greater than zero, the default value is 8MB).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2170777, 2170778, 2174685, 2174686, 2174687, 2174688, 2174689    
Bug Blocks: 2170009    

Description Sandipan Roy 2023-02-17 08:11:56 UTC
In PHP 8.0.X before 8.0.28, 8.1.X before 8.1.16 and 8.2.X before 8.2.3, excessive number of parts in HTTP form upload can cause high resource consumption and excessive number of log entries. This can cause denial of service on the affected server by exhausting CPU resources or disk space.

https://github.com/php/php-src/security/advisories/GHSA-54hq-v5wp-fqgv

Comment 1 Sandipan Roy 2023-02-17 08:41:11 UTC
Created php tracking bugs for this issue:

Affects: fedora-36 [bug 2170777]
Affects: fedora-37 [bug 2170778]