Improper input validation in Apache Tomcat
CVE-2016-6816
The code in Apache Tomcat 9.0.0.M1 to 9.0.0.M11, 8.5.0 to 8.5.6, 8.0.0.RC1 to 8.0.38, 7.0.0 to 7.0.72, and 6.0.0 to 6.0.47 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 and/or obtain sensitive information from requests other then their own.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.396 (98.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.
Affected products
- Apache Tomcat — versions 6.0.0, 6.0.1, 6.0.2
- Apache Software Foundation Tomcat — versions 7.0.0 to 7.0.72, Earlier, unsupported versions may also be affected., 9.0.0.M1 to 9.0.0.M11
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (x_refsource_REDHAT, vendor-advisory)
- security@apache.org (exploit, x_refsource_EXPLOIT-DB)
- security@apache.org (x_refsource_CONFIRM, Release Notes, Vendor Advisory)
- security@apache.org (x_refsource_CONFIRM, Release Notes, Vendor Advisory)
- security@apache.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- security@apache.org (vendor-advisory, x_refsource_DEBIAN)
- security@apache.org (x_refsource_CONFIRM, Release Notes, Vendor Advisory)
- security@apache.org (x_refsource_REDHAT, vendor-advisory)
- security@apache.org (x_refsource_CONFIRM)
- security@apache.org (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2016-6816?
- CVE-2016-6816 is a high-severity vulnerability in Apache Tomcat, classified under Improper Input Validation. CVSS score: 7.1/10. Published 2017-03-20.
- How severe is CVE-2016-6816?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2016-6816 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.