VulnerabilityModified

CVE-2016-6816

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.

HIGH 7.1EPSS 39.6%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 39.6%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.

Description

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.

CVSS 3.0: 7.1 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
EPSS: 39.63% probability · 99th percentile
CISA KEV: Not listed
Weakness: CWE-20
Affected: apache/tomcat
Source: security@apache.org

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.