CVE-2018-14773

Severity

40%

Complexity

80%

Confidentiality

48%

An issue was discovered in Http Foundation in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. It arises from support for a (legacy) IIS header that lets users override the path in the request URL via the X-Original-URL or X-Rewrite-URL HTTP request header. These headers are designed for IIS support, but it's not verified that the server is in fact running IIS, which means anybody who can send these requests to an application can trigger this. This affects \Symfony\Component\HttpFoundation\Request::prepareRequestUri() where X-Original-URL and X_REWRITE_URL are both used. The fix drops support for these methods so that they cannot be used as attack vectors such as web cache poisoning.

An issue was discovered in Http Foundation in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. It arises from support for a (legacy) IIS header that lets users override the path in the request URL via the X-Original-URL or X-Rewrite-URL HTTP request header. These headers are designed for IIS support, but it's not verified that the server is in fact running IIS, which means anybody who can send these requests to an application can trigger this. This affects \Symfony\Component\HttpFoundation\Request::prepareRequestUri() where X-Original-URL and X_REWRITE_URL are both used. The fix drops support for these methods so that they cannot be used as attack vectors such as web cache poisoning.

CVSS 3.0 Base Score 6.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).

CVSS 2.0 Base Score 4. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:S/C:N/I:P/A:N).

Overview

First reported 6 years ago

2018-08-03 17:29:00

Last updated 5 years ago

2019-10-03 00:03:00

Affected Software

Debian Linux 8.0 (Jessie)

8.0

References

104943

Third Party Advisory, VDB Entry

1041405

Third Party Advisory, VDB Entry

https://github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b

Issue Tracking, Patch, Third Party Advisory

[debian-lts-announce] 20190310 [SECURITY] [DLA 1707-1] symfony security update

Mailing List, Third Party Advisory

20190510 [SECURITY] [DSA 4441-1] symfony security update

https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers

Patch, Vendor Advisory

DSA-4441

https://www.drupal.org/SA-CORE-2018-005

Patch, Third Party Advisory

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