CVE-2020-15094

Name	CVE-2020-15094
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	high

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
symfony (PTS)	stretch (security), stretch	2.8.7+dfsg-1.3+deb9u3	fixed
	buster, buster (security)	3.4.22+dfsg-2+deb10u1	fixed
	bullseye, sid	4.4.19+dfsg-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
symfony	source	stretch	(not affected)
symfony	source	buster	(not affected)
symfony	source	(unstable)	4.4.13+dfsg-1

Notes

[buster] - symfony <not-affected> (Vulnerable code introduced later - in v4.4.0)
[stretch] - symfony <not-affected> (Vulnerable code introduced later - in v4.4.0)
https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r
https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78