~ / search / GHSA-754h-5r27-7x3r

GHSA-754h-5r27-7x3r

RCE in Symfony

Source: GitHub Advisory Database (reviewed) High CVE-2020-15094

Packages

EcosystemPackageAffectedFixed in
Packagist symfony/http-kernel >= 4.3.0, < 4.4.13 4.4.13
Packagist symfony/http-kernel >= 5.0.0, < 5.1.5 5.1.5
Packagist symfony/symfony >= 4.3.0, < 4.4.13 4.4.13
Packagist symfony/symfony >= 5.0.0, < 5.1.5 5.1.5

Details

As written in the advisory (Markdown source, shown as plain text).

Description ----------- 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. Resolution ---------- HTTP headers designed for internal use in `HttpCache` are now stripped from remote responses before being passed to `HttpCache`. The patch for this issue is available [here](https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78) for the 4.4 branch. Credits ------- I would like to thank Matthias Pigulla (webfactory GmbH) for reporting and fixing the issue.

References

External links from the advisory. They lead to third-party sites.