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cvelistApacheCVELIST:CVE-2020-17527
HistoryDec 03, 2020 - 6:30 p.m.

CVE-2020-17527 Apache Tomcat: Request header mix-up between HTTP/2 streams

2020-12-0318:30:14
CWE-200
apache
www.cve.org

7.5 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

69.6%

While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.

CNA Affected

[
  {
    "product": "Apache Tomcat",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "status": "affected",
        "version": "Apache Tomcat 10 10.0.0-M1 to 10.0.0-M9"
      },
      {
        "status": "affected",
        "version": "Apache Tomcat 9 9.0.0-M1 to 9.0.39"
      },
      {
        "status": "affected",
        "version": "Apache Tomcat 8.5 8.5.0 to 8.5.59"
      }
    ]
  }
]

References