high
7.5
CWE
200
Advisory Published
CVE Published
Advisory Published
Updated

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

First published: Thu Dec 03 2020(Updated: )

Apache Tomcat could allow a remote attacker to obtain sensitive information, caused by an issue when the HTTP request header value can be reused from the previous stream received on an HTTP/2 connection. By sending a specially-crafted HTTP request, an attacker could exploit this vulnerability to obtain sensitive information, and use this information to launch further attacks against the affected system.

Credit: security@apache.org

Affected SoftwareAffected VersionHow to fix
redhat/jws5-tomcat<0:9.0.36-9.redhat_8.1.el7
0:9.0.36-9.redhat_8.1.el7
redhat/jws5-tomcat-native<0:1.2.25-3.redhat_3.el7
0:1.2.25-3.redhat_3.el7
redhat/jws5-tomcat<0:9.0.36-9.redhat_8.1.el8
0:9.0.36-9.redhat_8.1.el8
redhat/jws5-tomcat-native<0:1.2.25-3.redhat_3.el8
0:1.2.25-3.redhat_3.el8
redhat/tomcat<10.0.0
10.0.0
redhat/tomcat<9.0.40
9.0.40
redhat/tomcat<8.5.60
8.5.60
maven/org.apache.tomcat:tomcat-coyote>=8.5.0<8.5.60
8.5.60
maven/org.apache.tomcat:tomcat-coyote>=9.0.0-M1<9.0.40
9.0.40
maven/org.apache.tomcat:tomcat-coyote>=10.0.0-M1<10.0.0-M10
10.0.0-M10
debian/tomcat9
9.0.43-2~deb11u10
9.0.43-2~deb11u11
9.0.70-2
9.0.95-1
IBM Engineering Requirements Management DOORS Web Access<=9.7.2.7
IBM Rational DOORS Web Access<=9.7.2.7
Tomcat>=8.5.1<=8.5.59
Tomcat>=9.0.1<=9.0.35
Tomcat=9.0.0-milestone10
Tomcat=9.0.0-milestone11
Tomcat=9.0.0-milestone12
Tomcat=9.0.0-milestone13
Tomcat=9.0.0-milestone14
Tomcat=9.0.0-milestone15
Tomcat=9.0.0-milestone16
Tomcat=9.0.0-milestone17
Tomcat=9.0.0-milestone18
Tomcat=9.0.0-milestone19
Tomcat=9.0.0-milestone20
Tomcat=9.0.0-milestone21
Tomcat=9.0.0-milestone22
Tomcat=9.0.0-milestone23
Tomcat=9.0.0-milestone24
Tomcat=9.0.0-milestone25
Tomcat=9.0.0-milestone26
Tomcat=9.0.0-milestone27
Tomcat=9.0.0-milestone5
Tomcat=9.0.0-milestone6
Tomcat=9.0.0-milestone7
Tomcat=9.0.0-milestone8
Tomcat=9.0.0-milestone9
Tomcat=9.0.35-3.39.1
Tomcat=9.0.35-3.57.3
Tomcat=9.0.36
Tomcat=9.0.37
Tomcat=9.0.38
Tomcat=9.0.39
Tomcat=10.0.0-milestone1
Tomcat=10.0.0-milestone2
Tomcat=10.0.0-milestone3
Tomcat=10.0.0-milestone4
Tomcat=10.0.0-milestone5
Tomcat=10.0.0-milestone6
Tomcat=10.0.0-milestone7
Tomcat=10.0.0-milestone8
Tomcat=10.0.0-milestone9
NetApp Element Plug-in for vCenter Server
NetApp System Manager>=3.0.0<=3.1.3
Debian Linux=9.0
Debian Linux=10.0
Oracle Blockchain Platform<21.1.2
Oracle Communications Cloud Native Core Binding Support Function=1.10.0
Oracle Communications Cloud Native Core Policy=1.14.0
Oracle Communications Instant Messaging Server=10.0.1.5.0
Oracle Instantis EnterpriseTrack=17.1
Oracle Instantis EnterpriseTrack=17.2
Oracle Instantis EnterpriseTrack=17.3
MySQL Enterprise Monitor<8.0.23
Oracle SD-WAN Edge=9.0
Oracle Workload Manager=18c
Oracle Workload Manager=19c

Remedy

https://www.oracle.com//security-alerts/cpujul2021.html

Remedy

https://www.oracle.com/security-alerts/cpuApr2021.html

Remedy

https://www.oracle.com/security-alerts/cpuapr2022.html

Remedy

https://www.oracle.com/security-alerts/cpujan2022.html

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2020-17527?

    The severity of CVE-2020-17527 is high.

  • How does CVE-2020-17527 affect Apache Tomcat?

    CVE-2020-17527 affects Apache Tomcat versions 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.

  • How can I fix CVE-2020-17527 in Apache Tomcat?

    To fix CVE-2020-17527 in Apache Tomcat, update to version 10.0.0-M10, 9.0.40, or 8.5.60.

  • Are there any references for CVE-2020-17527?

    Yes, you can find references for CVE-2020-17527 at the following links: [reference 1](https://www.cve.org/CVERecord?id=CVE-2020-17527), [reference 2](https://nvd.nist.gov/vuln/detail/CVE-2020-17527), [reference 3](http://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.0-M10), [reference 4](http://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.60), [reference 5](http://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.40), [reference 6](https://bugzilla.redhat.com/show_bug.cgi?id=1904221), [reference 7](https://access.redhat.com/errata/RHSA-2021:5134).

  • What is the Common Weakness Enumeration (CWE) ID for CVE-2020-17527?

    The Common Weakness Enumeration (CWE) ID for CVE-2020-17527 is 200.

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