What’s Vulnerable › Vulnerabilities
CVE-2017-2666
- Severity: medium (CVSS 6.5 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 3.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2018-07-27 · updated 2026-06-17
- Weakness: CWE-444
Description
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.
Affected products
- Debian Linux: 9.0, 10.0
- Red Hat JBoss EAP: 7.0.0, 7.1.0
- Red Hat undertow: all versions
References
- http://rhn.redhat.com/errata/RHSA-2017-1409.html
- http://www.securityfocus.com/bid/98966
- https://access.redhat.com/errata/RHSA-2017:1410
- https://access.redhat.com/errata/RHSA-2017:1411
- https://access.redhat.com/errata/RHSA-2017:1412
- https://access.redhat.com/errata/RHSA-2017:3454
- https://access.redhat.com/errata/RHSA-2017:3455
- https://access.redhat.com/errata/RHSA-2017:3456
- https://access.redhat.com/errata/RHSA-2017:3458
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2666
- https://www.debian.org/security/2017/dsa-3906
- http://rhn.redhat.com/errata/RHSA-2017-1409.html
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