CVSS 3.0
6.5 mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NCVE-2017-2666
Medium (6.5). EPSS 3.1% chance of exploitation in the next 30 days. Fixed in io.undertow:undertow-core 1.3.31, 1.4.17.
It was discovered in Undertow that the code that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.
Severity
- EPSS
- 3.1% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
- CWE
- CWE-444
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- redhat:jboss_enterprise_application_platform
- redhat:undertow
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-mcfm-h73v-635m | Maven | io.undertow:undertow-core | <1.3.31 | 1.3.31 |
| GHSA-mcfm-h73v-635m | Maven | io.undertow:undertow-core | >=1.4.0 <1.4.17 | 1.4.17 |