Vulnerability in Drupal
CVE-2018-14773
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.576 (99.1th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.581 · newest: 0.576 · change: -0.004
Affected products
- Drupal
- Sensiolabs Symfony
- Debian Linux — versions 8.0, 9.0
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/104943 (VDB Entry, Third Party Advisory, vdb-entry)
- www.drupal.org/SA-CORE-2018-005 (Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/03/msg00009.html (mailing-list, Mailing List, Third Party Advisory)
- symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers (Patch, Vendor Advisory)
- github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b (Patch, Third Party Advisory, Issue Tracking)
- www.securitytracker.com/id/1041405 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2019/dsa-4441 (vendor-advisory, Third Party Advisory)
- seclists.org/bugtraq/2019/May/21 (mailing-list, Mailing List, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2018-14773?
- CVE-2018-14773 is a medium-severity vulnerability in Drupal. CVSS score: 6.5/10. Published 2018-08-03.
- How severe is CVE-2018-14773?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2018-14773 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.