CVE-2018-14773
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network with a low-privilege account. High risk of data tampering.
- Exploit odds
- 57.6% chance of exploitation in the next 30 days (EPSS). Higher than most.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 57.6% in the next 30 days (EPSS).
- Severity: 6.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 57.6% · EPSS, next 30 days
- Record status
- Modified
Affected
- Sensiolabs Symfony ≤ 2.7.48
- Sensiolabs Symfony ≤ 2.8.43
- Sensiolabs Symfony ≤ 3.3.17
- Sensiolabs Symfony ≤ 3.4.13
- Sensiolabs Symfony ≤ 4.0.13
- Sensiolabs Symfony ≤ 4.1.2
- Debian Linux 8.0
- Debian Linux 9.0
Attack profile CVSS 3.1 · 6.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2018-14773.md and follow it. Check whether this project is affected by CVE-2018-14773. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b
- https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers
- https://www.drupal.org/SA-CORE-2018-005
- https://github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b
- https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers
- https://www.drupal.org/SA-CORE-2018-005
References
- http://www.securityfocus.com/bid/104943
- http://www.securitytracker.com/id/1041405
- https://github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b
- https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
- https://seclists.org/bugtraq/2019/May/21
- https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers
- https://www.debian.org/security/2019/dsa-4441
- https://www.drupal.org/SA-CORE-2018-005
- http://www.securityfocus.com/bid/104943
- http://www.securitytracker.com/id/1041405
- https://github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b
- https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
- https://seclists.org/bugtraq/2019/May/21
- https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers
- https://www.debian.org/security/2019/dsa-4441
- https://www.drupal.org/SA-CORE-2018-005