Vulnerability CVE-2020-15094
Published: 2020-09-02

Description:
In Symfony before versions 4.4.13 and 5.1.5, the CachingHttpClient class from the HttpClient Symfony component relies on the HttpCache class to handle requests. HttpCache uses internal headers like X-Body-Eval and X-Body-File to control the restoration of cached responses. The class was initially written with surrogate caching and ESI support in mind (all HTTP calls come from a trusted backend in that scenario). But when used by CachingHttpClient and if an attacker can control the response for a request being made by the CachingHttpClient, remote code execution is possible. This has been fixed in versions 4.4.13 and 5.1.5.

Type:

CWE-212

 (Improper Cross-boundary Removal of Sensitive Data)

 References:
https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78
https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r
https://packagist.org/packages/symfony/http-kernel
https://packagist.org/packages/symfony/symfony
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