CVE-2023-45648 Apache Tomcat: Trailer header parsing too lenient

2023-10-1018:38:34

CWE-20

apache

www.cve.org

apache tomcat

input validation

request smuggling

6.7 Medium

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

60.6%

JSON

Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially
crafted, invalid trailer header could cause Tomcat to treat a single
request as multiple requests leading to the possibility of request
smuggling when behind a reverse proxy.

Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue.

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "Apache Tomcat",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThanOrEqual": "11.0.0-M11",
        "status": "affected",
        "version": "11.0.0-M1",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.1.13",
        "status": "affected",
        "version": "10.1.0-M1",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "9.0.81",
        "status": "affected",
        "version": "9.0.0-M1",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "8.5.93",
        "status": "affected",
        "version": "8.5.0",
        "versionType": "semver"
      }
    ]
  }
]