{"id":"GHSA-754h-5r27-7x3r","summary":"RCE in Symfony","details":"Description\n-----------\n\nThe `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.\n\nResolution\n----------\n\nHTTP headers designed for internal use in `HttpCache` are now stripped from remote responses before being passed to `HttpCache`.\n\nThe patch for this issue is available [here](https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78) for the 4.4 branch.\n\nCredits\n-------\n\nI would like to thank Matthias Pigulla (webfactory GmbH) for reporting and fixing the issue.","aliases":["BIT-symfony-2020-15094","CVE-2020-15094"],"modified":"2026-05-07T05:01:24.738074703Z","published":"2020-09-02T17:29:56Z","database_specific":{"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2020-09-02T17:29:29Z","nvd_published_at":"2020-09-02T18:15:00Z","cwe_ids":["CWE-212"]},"references":[{"type":"WEB","url":"https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-15094"},{"type":"WEB","url":"https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-kernel/CVE-2020-15094.yaml"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-15094.yaml"},{"type":"PACKAGE","url":"https://github.com/symfony/symfony"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HNGUWOEETOFVH4PN3I3YO4QZHQ4AUKF3"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VAQJXAKWPMWB7OL6QPG2ZSEQZYYPU5RC"},{"type":"WEB","url":"https://packagist.org/packages/symfony/http-kernel"},{"type":"WEB","url":"https://packagist.org/packages/symfony/symfony"},{"type":"WEB","url":"https://symfony.com/cve-2020-15094"}],"affected":[{"package":{"name":"symfony/http-kernel","ecosystem":"Packagist","purl":"pkg:composer/symfony/http-kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.3.0"},{"fixed":"4.4.13"}]}],"versions":["v4.3.0","v4.3.1","v4.3.10","v4.3.11","v4.3.2","v4.3.3","v4.3.4","v4.3.5","v4.3.6","v4.3.7","v4.3.8","v4.3.9","v4.4.0","v4.4.0-BETA1","v4.4.0-BETA2","v4.4.0-RC1","v4.4.1","v4.4.10","v4.4.11","v4.4.12","v4.4.2","v4.4.3","v4.4.4","v4.4.5","v4.4.6","v4.4.7","v4.4.8","v4.4.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/09/GHSA-754h-5r27-7x3r/GHSA-754h-5r27-7x3r.json"}},{"package":{"name":"symfony/http-kernel","ecosystem":"Packagist","purl":"pkg:composer/symfony/http-kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.1.5"}]}],"versions":["v5.0.0","v5.0.1","v5.0.10","v5.0.11","v5.0.2","v5.0.3","v5.0.4","v5.0.5","v5.0.6","v5.0.7","v5.0.8","v5.0.9","v5.1.0","v5.1.0-BETA1","v5.1.0-RC1","v5.1.0-RC2","v5.1.1","v5.1.2","v5.1.3","v5.1.4"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/09/GHSA-754h-5r27-7x3r/GHSA-754h-5r27-7x3r.json"}},{"package":{"name":"symfony/symfony","ecosystem":"Packagist","purl":"pkg:composer/symfony/symfony"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.3.0"},{"fixed":"4.4.13"}]}],"versions":["v4.3.0","v4.3.1","v4.3.10","v4.3.11","v4.3.2","v4.3.3","v4.3.4","v4.3.5","v4.3.6","v4.3.7","v4.3.8","v4.3.9","v4.4.0","v4.4.0-BETA1","v4.4.0-BETA2","v4.4.0-RC1","v4.4.1","v4.4.10","v4.4.11","v4.4.12","v4.4.2","v4.4.3","v4.4.4","v4.4.5","v4.4.6","v4.4.7","v4.4.8","v4.4.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/09/GHSA-754h-5r27-7x3r/GHSA-754h-5r27-7x3r.json"}},{"package":{"name":"symfony/symfony","ecosystem":"Packagist","purl":"pkg:composer/symfony/symfony"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.1.5"}]}],"versions":["v5.0.0","v5.0.1","v5.0.10","v5.0.11","v5.0.2","v5.0.3","v5.0.4","v5.0.5","v5.0.6","v5.0.7","v5.0.8","v5.0.9","v5.1.0","v5.1.0-BETA1","v5.1.0-RC1","v5.1.0-RC2","v5.1.1","v5.1.2","v5.1.3","v5.1.4"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/09/GHSA-754h-5r27-7x3r/GHSA-754h-5r27-7x3r.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H"}]}