CVE-2020-13934

Description

An h2c direct connection to Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M5 to 9.0.36 and 8.5.1 to 8.5.56 did not release the HTTP/1.1 processor after the upgrade to HTTP/2. If a sufficient number of such requests were made, an OutOfMemoryException could occur leading to a denial of service.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 22.72% Top 5%
Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory apache.org
Affected: n/a Apache Tomcat
Published at:
Updated at:

References

Link Tags
https://lists.apache.org/thread.html/r61f411cf82488d6ec213063fc15feeeb88e31b0ca9c29652ee4f962e%40%3Cannounce.tomcat.apache.org%3E vendor advisory mailing list release notes
https://www.debian.org/security/2020/dsa-4727 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00017.html third party advisory mailing list
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00084.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00088.html vendor advisory mailing list third party advisory
https://lists.apache.org/thread.html/ra072b1f786e7d139e86f1d1145572e0ff71cef38a96d9c6f5362aac8%40%3Cdev.tomcat.apache.org%3E mailing list
https://www.oracle.com/security-alerts/cpuoct2020.html third party advisory patch
https://security.netapp.com/advisory/ntap-20200724-0003/ third party advisory
https://usn.ubuntu.com/4596-1/ third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpujan2021.html third party advisory patch
https://www.oracle.com/security-alerts/cpuApr2021.html third party advisory patch
https://www.oracle.com//security-alerts/cpujul2021.html third party advisory patch
https://www.oracle.com/security-alerts/cpujan2022.html third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2020-13934?
CVE-2020-13934 has been scored as a high severity vulnerability.
How to fix CVE-2020-13934?
To fix CVE-2020-13934, 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-2020-13934 being actively exploited in the wild?
It is possible that CVE-2020-13934 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~23% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-13934?
CVE-2020-13934 affects n/a Apache Tomcat.
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