CVE-2019-0197

Description

A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38. When HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2 on a https: host, an Upgrade request from http/1.1 to http/2 that was not the first request on a connection could lead to a misconfiguration and crash. Server that never enabled the h2 protocol or that only enabled it for https: and did not set "H2Upgrade on" are unaffected by this issue.

Category

4.2
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.20% Top 20%
Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory apache.org
Affected: Apache Software Foundation Apache HTTP Server
Published at:
Updated at:

References

Link Tags
https://httpd.apache.org/security/vulnerabilities_24.html vendor advisory
http://www.openwall.com/lists/oss-security/2019/04/02/2 third party advisory mailing list
http://www.securityfocus.com/bid/107665 third party advisory vdb entry
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WETXNQWNQLWHV6XNW6YTO5UGDTIWAQGT/ vendor advisory
https://lists.apache.org/thread.html/e0b8f6e858b1c8ec2ce8e291a2c543d438915037c7af661ab6d33808%40%3Cdev.httpd.apache.org%3E
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00051.html patch vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00061.html patch vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00084.html patch vendor advisory mailing list third party advisory
https://support.f5.com/csp/article/K44591505 third party advisory
https://security.netapp.com/advisory/ntap-20190617-0002/ third party advisory
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html third party advisory patch
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E mailing list
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03950en_us third party advisory
https://usn.ubuntu.com/4113-1/ third party advisory vendor advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html third party advisory patch
https://access.redhat.com/errata/RHSA-2019:3933 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:3935 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:3932 third party advisory vendor advisory
https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E mailing list
https://www.oracle.com/security-alerts/cpuapr2020.html third party advisory
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r03ee478b3dda3e381fd6189366fa7af97c980d2f602846eef935277d%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/re473305a65b4db888e3556e4dae10c2a04ee89dcff2e26ecdbd860a9%40%3Ccvs.httpd.apache.org%3E mailing list
https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E mailing list

Frequently Asked Questions

What is the severity of CVE-2019-0197?
CVE-2019-0197 has been scored as a medium severity vulnerability.
How to fix CVE-2019-0197?
To fix CVE-2019-0197, 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-2019-0197 being actively exploited in the wild?
It is possible that CVE-2019-0197 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-0197?
CVE-2019-0197 affects Apache Software Foundation Apache HTTP Server.
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