CVE-2019-17569

Description

The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were incorrectly processed leading to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.

Category

4.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 9.93% Top 10%
Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory debian.org Vendor Advisory apache.org
Affected: Apache Apache Tomcat
Published at:
Updated at:

References

Link Tags
https://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3E mailing list vendor advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html third party advisory mailing list
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html mailing list third party advisory vendor advisory
https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3E mailing list
https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apache.org%3E mailing list
https://www.debian.org/security/2020/dsa-4673 third party advisory vendor advisory
https://www.debian.org/security/2020/dsa-4680 third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpujul2020.html third party advisory patch
https://security.netapp.com/advisory/ntap-20200327-0005/ third party advisory
https://www.oracle.com/security-alerts/cpuoct2020.html third party advisory patch
https://www.oracle.com/security-alerts/cpujan2021.html third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2019-17569?
CVE-2019-17569 has been scored as a medium severity vulnerability.
How to fix CVE-2019-17569?
To fix CVE-2019-17569, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-17569 being actively exploited in the wild?
It is possible that CVE-2019-17569 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~10% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-17569?
CVE-2019-17569 affects Apache Apache Tomcat.
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