CVE-2020-15094

RCE in Symfony

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.

Category

8.0
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.25% Top 20%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org
Affected: symfony symfony
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2020-15094?
CVE-2020-15094 has been scored as a high severity vulnerability.
How to fix CVE-2020-15094?
To fix CVE-2020-15094, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-15094 being actively exploited in the wild?
It is possible that CVE-2020-15094 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-15094?
CVE-2020-15094 affects symfony symfony.
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