RCE in Symfony
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.
beschreibt (1)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2020-15094US | high8.8 | — | ||
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 inte… | ||||
Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-kernel/CVE-2020-15094.yamlWEB
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-15094.yamlWEB
- https://github.com/symfony/symfonyPACKAGE
- https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78WEB
- https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3rWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HNGUWOEETOFVH4PN3I3YO4QZHQ4AUKF3WEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VAQJXAKWPMWB7OL6QPG2ZSEQZYYPU5RCWEB
- https://nvd.nist.gov/vuln/detail/CVE-2020-15094ADVISORY
Advisories wie diese benennen die exponierten Produkte, die Angreifer auf Ihrer Angriffsfläche ins Visier nehmen. Sehen Sie mit einem kostenlosen Passiv-Scan, was exponiert ist.
Kostenloser Scan