Explain CVE-2019-0197
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.
Affected Products: Apache HTTP Server
References: [{'tags': ['x_refsource_CONFIRM'], 'url': 'https://httpd.apache.org/security/vulnerabilities_24.html'}, {'name': '[oss-security] 20190401 CVE-2019-0197: mod_http2, possible crash on late upgrade', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'http://www.openwall.com/lists/oss-security/2019/04/02/2'}, {'name': '107665', 'tags': ['vdb-entry', 'x_refsource_BID'], 'url': 'http://www.securityfocus.com/bid/107665'}, {'name': 'FEDORA-2019-cf7695b470', 'tags': ['vendor-advisory', 'x_refsource_FEDORA'], 'url': 'https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WETXNQWNQLWHV6XNW6YTO5UGDTIWAQGT/'}, {'tags': ['x_refsource_MISC'], 'url': 'https://lists.apache.org/thread.html/e0b8f6e858b1c8ec2ce8e291a2c543d438915037c7af661ab6d33808%40%3Cdev.httpd.apache.org%3E'}, {'name': 'openSUSE-SU-2019:1190', 'tags': ['vendor-advisory', 'x_refsource_SUSE'], 'url': 'http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00051.html'}, {'name': 'openSUSE-SU-2019:1209', 'tags': ['vendor-advisory', 'x_refsource_SUSE'], 'url': 'http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00061.html'}, {'name': 'openSUSE-SU-2019:1258', 'tags': ['vendor-advisory', 'x_refsource_SUSE'], 'url': 'http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00084.html'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://support.f5.com/csp/article/K44591505'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://security.netapp.com/advisory/ntap-20190617-0002/'}, {'tags': ['x_refsource_MISC'], 'url': 'https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html'}, {'name': '[httpd-cvs] 20190815 svn commit: r1048743 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20190815 svn commit: r1048742 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03950en_us'}, {'name': 'USN-4113-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/4113-1/'}, {'tags': ['x_refsource_MISC'], 'url': 'https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html'}, {'name': 'RHSA-2019:3933', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:3933'}, {'name': 'RHSA-2019:3935', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:3935'}, {'name': 'RHSA-2019:3932', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:3932'}, {'name': '[httpd-cvs] 20200401 svn commit: r1058586 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20200401 svn commit: r1058587 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E'}, {'tags': ['x_refsource_MISC'], 'url': 'https://www.oracle.com/security-alerts/cpuapr2020.html'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073143 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073140 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073139 [12/13] - in /websites/staging/httpd/trunk/content: ./ security/json/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/r03ee478b3dda3e381fd6189366fa7af97c980d2f602846eef935277d%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1888194 [12/13] - /httpd/site/trunk/content/security/json/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210330 svn commit: r1073149 [12/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/re473305a65b4db888e3556e4dae10c2a04ee89dcff2e26ecdbd860a9%40%3Ccvs.httpd.apache.org%3E'}, {'name': '[httpd-cvs] 20210606 svn commit: r1075470 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E'}]
CVE State: PUBLISHED