CVE-2020-13934

high-risk

Published 2020-07-14

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.

Do I need to act?

23.4% chance of exploitation in next 30 days

EPSS score — higher than 77% of all CVEs

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (20)

Tomcat

Affected Vendors

Debian Apache Oracle Canonical Netapp Opensuse

References (26)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00084.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00088.html

Mailing List https://lists.apache.org/thread.html/r61f411cf82488d6ec213063fc15feeeb88e31b0ca9...

https://lists.apache.org/thread.html/ra072b1f786e7d139e86f1d1145572e0ff71cef38a9...

Mailing List https://lists.debian.org/debian-lts-announce/2020/07/msg00017.html

Third Party Advisory https://security.netapp.com/advisory/ntap-20200724-0003/

Third Party Advisory https://usn.ubuntu.com/4596-1/

Third Party Advisory https://www.debian.org/security/2020/dsa-4727

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

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

Patch https://www.oracle.com/security-alerts/cpujan2021.html

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

Patch https://www.oracle.com/security-alerts/cpuoct2020.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00084.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00088.html

Mailing List https://lists.apache.org/thread.html/r61f411cf82488d6ec213063fc15feeeb88e31b0ca9...

https://lists.apache.org/thread.html/ra072b1f786e7d139e86f1d1145572e0ff71cef38a9...

Mailing List https://lists.debian.org/debian-lts-announce/2020/07/msg00017.html

Third Party Advisory https://security.netapp.com/advisory/ntap-20200724-0003/

Third Party Advisory https://usn.ubuntu.com/4596-1/

and 6 more references

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high-risk

Severity 26/34 · High

Exploitability 14/34 · Moderate

Exposure 26/34 · High