CVE-2018-14773: debian debian_linux
Vulnerability summary
CVE-2018-14773 is a medium (CVSS 6.5) vulnerability in debian debian_linux. EPSS estimates a 57.64% chance of exploitation in the next 30 days, higher than 99% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 2Timeline
- 03-08-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
57.64%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
-0.42 pp
From 58.06% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Debian2 products
- symfony< 3.4.14+dfsg-1
- debian_linuxEOL8.0 | 9.0
Drupal1 product
- drupal≥ 8.0.0, < 8.5.6
Sensiolabs1 product
- symfony> 2.7.0, ≤ 2.7.48 | ≥ 2.8.0, ≤ 2.8.43 | ≥ 3.3.0, ≤ 3.3.17 | ≥ 3.4.0, ≤ 3.4.13 | ≥ 4.0.0, ≤ 4.0.13 | ≥ 4.1.0, ≤ 4.1.2
Ubuntu1 product
- symfonyAll versions (No fix recorded)
4 vendors · 5 products
References
11 links
lists.debian.org/debian-lts-announce/2019/03/msg00009.htmlMailing ListX Refsource MLISTThird Party Advisory- symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headersX Refsource CONFIRMPatchVendor AdvisoryREPORT
- github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6bX Refsource CONFIRMIssue TrackingPatchThird Party Advisory