Vulnerability in [Unknown] Undertow
CVE-2017-2666
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.
Vulnerability class: HTTP Request Smuggling
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.032 (87.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.032 · change: +0.005
Affected products
- [Unknown] Undertow
- Debian Linux — versions 9.0, 10.0
- Red Hat Enterprise Linux — versions 6.0, 7.0
- Red Hat Jboss Enterprise Application Platform — versions 7.0.0, 7.1.0
- Red Hat Undertow
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2017:1411 (vendor-advisory, Vendor Advisory)
- rhn.redhat.com/errata/RHSA-2017-1409.html (vendor-advisory, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
- www.debian.org/security/2017/dsa-3906 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:3458 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2017:1410 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2017:1412 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2017:3455 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2017:3456 (vendor-advisory, Vendor Advisory)
- www.securityfocus.com/bid/98966 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2017-2666?
- CVE-2017-2666 is a medium-severity vulnerability in [Unknown] Undertow, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 6.5/10. Published 2018-07-27.
- How severe is CVE-2017-2666?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2017-2666 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.