CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
36.8%
Previous versions of ReactPHP’s HTTP server component contain a potential DoS vulnerability that can cause high CPU load when processing large HTTP request bodies. This vulnerability has little to no impact on the default configuration, but can be exploited when explicitly using the RequestBodyBufferMiddleware
with very large settings. This might lead to consuming large amounts of CPU time for processing requests and significantly delay or slow down the processing of legitimate user requests.
The supplied patch resolves this vulnerability for ReactPHP.
Keeping the request body limit using RequestBodyBufferMiddleware
sensible will mitigate it.
Infrastructure or DevOps can place a reverse proxy in front of the ReactPHP HTTP server to filter out any excessive HTTP request bodies.
A similar vulnerability was discovered in PHP recently, see also PHP’s security advisory (CVE-2023-0662). The fix is based on the PHP-FPM fix.
github.com/advisories/GHSA-95x4-j7vc-h8mf
github.com/FriendsOfPHP/security-advisories/blob/master/react/http/CVE-2023-26044.yaml
github.com/php/php-src/commit/716de0cff539f46294ef70fe75d548cd66766370#diff-81d659aa9e83177ac08151f99cebf21ab331d22462c72a1039f59947e66f5a35
github.com/php/php-src/security/advisories/GHSA-54hq-v5wp-fqgv
github.com/reactphp/http
github.com/reactphp/http/commit/9681f764b80c45ebfb5fe2ea7da5bd3babfcdcfd
github.com/reactphp/http/releases/tag/v1.9.0
github.com/reactphp/http/security/advisories/GHSA-95x4-j7vc-h8mf
nvd.nist.gov/vuln/detail/CVE-2023-26044