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.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15094
Reference (s):
- https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r
- URL: https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r
- FEDORA:FEDORA-2020-16eb328853
- URL: https://lists.fedoraproject.org/archives/list/[email protected]/message/VAQJXAKWPMWB7OL6QPG2ZSEQZYYPU5RC/
- FEDORA:FEDORA-2020-1c549262f1