CVE-2018-14773
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 8.5.6-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 3.4.14+dfsg-1 |
| sid | Fixed | 3.4.14+dfsg-1 |
| forky | Fixed | 3.4.14+dfsg-1 |
| bullseye | Fixed | 3.4.14+dfsg-1 |
| bookworm | Fixed | 3.4.14+dfsg-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | symfony/http-foundation | >=2.7.0,<2.7.49 | 2.7.49 |
| Packagist | symfony/http-foundation | >=2.8.0,<2.8.44 | 2.8.44 |
| Packagist | symfony/http-foundation | >=3.0.0,<3.3.18 | 3.3.18 |
| Packagist | symfony/http-foundation | >=3.4.0,<3.4.14 | 3.4.14 |
| Packagist | symfony/http-foundation | >=4.0.0,<4.0.14 | 4.0.14 |
| Packagist | symfony/http-foundation | >=4.1.0,<4.1.3 | 4.1.3 |
| Packagist | symfony/symfony | >=2.7.0,<2.7.49 | 2.7.49 |
| Packagist | symfony/symfony | >=2.8.0,<2.8.44 | 2.8.44 |
| Packagist | symfony/symfony | >=3.0.0,<3.3.18 | 3.3.18 |
| Packagist | symfony/symfony | >=3.4.0,<3.4.14 | 3.4.14 |
| Packagist | symfony/symfony | >=4.0.0,<4.0.14 | 4.0.14 |
| Packagist | symfony/symfony | >=4.1.0,<4.1.3 | 4.1.3 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2018-14773
- https://github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2018-14773.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2018-14773.yaml
- 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://security-tracker.debian.org/tracker/CVE-2018-14773
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.