CVE-2020-15094 RCE in Symfony

2020-09-0217:35:15

CWE-212

GitHub_M

www.cve.org

8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

8.9 High

AI Score

Confidence

High

0.007 Low

EPSS

Percentile

80.6%

JSON

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.

CNA Affected

[
  {
    "product": "symfony",
    "vendor": "symfony",
    "versions": [
      {
        "status": "affected",
        "version": ">= 4.4.0, < 4.4.13"
      },
      {
        "status": "affected",
        "version": ">= 5.0.0, < 5.1.5"
      }
    ]
  }
]