RCE in Symfony
CVE-2020-15094
8HIGH
What is CVE-2020-15094?
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.
Affected Version(s)
symfony >= 4.4.0, < 4.4.13 < 4.4.0, 4.4.13
symfony >= 5.0.0, < 5.1.5 < 5.0.0, 5.1.5