CVE-2020-9490
First published: Fri Aug 07 2020(Updated: )
Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability for unpatched servers.
Credit: security@apache.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/apache2 | 2.4.62-1~deb11u1 2.4.62-1~deb11u2 2.4.62-1~deb12u2 2.4.63-1 | |
| Apache Http Server | >=2.4.20<2.4.46 | |
| Oracle Communications Element Manager | >=8.2.0<=8.2.2 | |
| Oracle Communications Session Report Manager | >=8.2.0<=8.2.2 | |
| Oracle Communications Session Route Manager | >=8.2.0<=8.2.2 | |
| Oracle Enterprise Manager Ops Center | =12.4.0.0 | |
| Oracle Hyperion Infrastructure Technology | =11.1.2.4 | |
| Oracle Instantis EnterpriseTrack | =17.1 | |
| Oracle Instantis EnterpriseTrack | =17.2 | |
| Oracle Instantis EnterpriseTrack | =17.3 | |
| Oracle Storage Cloud Software Appliance | =8.8 | |
| SUSE Linux | =15.1 | |
| SUSE Linux | =15.2 | |
| Debian Linux | =10.0 | |
| Red Hat Fedora | =31 | |
| Red Hat Fedora | =32 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =20.04 | |
| All of | ||
| Red Hat Software Collections | =1.0 | |
| Any of | ||
| Red Hat Enterprise Linux | =6.0 | |
| Red Hat Enterprise Linux | =7.0 | |
| Red Hat Enterprise Linux | =7.6 | |
| Red Hat Enterprise Linux | =7.7 | |
| Red Hat OpenStack for IBM Power | =16.1 | |
| Red Hat OpenStack for IBM Power | =16.1 | |
| Red Hat Enterprise Linux | =8.0 | |
| Red Hat Enterprise Linux Server EUS | =8.1 | |
| Red Hat Enterprise Linux Server EUS | =8.2 | |
| Red Hat Enterprise Linux Server EUS | =8.4 | |
| Red Hat Enterprise Linux Server EUS | =8.6 | |
| Red Hat Enterprise Linux for IBM Z Systems | =8.0 | |
| Red Hat Enterprise Linux for IBM Z Systems (s390x) | =8.1 | |
| Red Hat Enterprise Linux for IBM Z Systems (s390x) | =8.2 | |
| Red Hat Enterprise Linux for IBM Z Systems (s390x) | =8.4 | |
| Red Hat Enterprise Linux for IBM Z Systems (s390x) | =8.6 | |
| Red Hat Enterprise Linux for Power, little endian | =8.0 | |
| Red Hat Enterprise Linux for Power, little endian - Extended Update Support | =8.1 | |
| Red Hat Enterprise Linux for Power, little endian - Extended Update Support | =8.2 | |
| Red Hat Enterprise Linux for Power, little endian - Extended Update Support | =8.4 | |
| Red Hat Enterprise Linux for Power, little endian - Extended Update Support | =8.6 | |
| Red Hat Enterprise Linux Server | =8.2 | |
| Red Hat Enterprise Linux Server | =8.4 | |
| Red Hat Enterprise Linux Server | =8.6 | |
| Red Hat Enterprise Linux for SAP Applications for Power, little endian - Extended Update Support | =8.1 | |
| Red Hat Enterprise Linux for SAP Applications for Power, little endian - Extended Update Support | =8.2 | |
| Red Hat Enterprise Linux for SAP Applications for Power, little endian - Extended Update Support | =8.4 | |
| Red Hat Enterprise Linux for SAP Applications for Power, little endian - Extended Update Support | =8.6 | |
| Red Hat Enterprise Linux Server | =8.2 | |
| Red Hat Enterprise Linux Server | =8.4 | |
| Red Hat Enterprise Linux Server | =8.6 | |
| Red Hat Enterprise Linux Server Update Services for SAP Solutions | =8.1 | |
| Red Hat Enterprise Linux Server Update Services for SAP Solutions | =8.2 | |
| Red Hat Enterprise Linux Server Update Services for SAP Solutions | =8.4 | |
| Red Hat Enterprise Linux Server Update Services for SAP Solutions | =8.6 | |
| Red Hat Software Collections | =1.0 | |
| Red Hat Enterprise Linux | =6.0 | |
| Red Hat Enterprise Linux | =7.0 | |
| Red Hat Enterprise Linux | =7.6 | |
| Red Hat Enterprise Linux | =7.7 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00068.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00071.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00081.html
- http://packetstormsecurity.com/files/160392/Apache-2.4.43-mod_http2-Memory-Corruption.html
- https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-9490
- https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r09bb998baee74a2c316446bd1a41ae7f8d7049d09d9ff991471e8775@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r0b6541c5fb2f8fb383861333400add7def625bc993300300de0b4f8d@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r3c5c3104813c1c5508b55564b66546933079250a46ce50eee90b2e36@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r5debe8f82728a00a4a68bc904dd6c35423bdfc8d601cfb4579f38bf1@%3Cdev.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r623de9b2b2433a87f3f3a15900419fc9c00c77b26936dfea4060f672@%3Cdev.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r97d0faab6ed8fd0d439234b16d05d77b22a07b0c4817e7b3cca419cc@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r9e485ce5a01c9dc3d4d785a7d28aa7400ead1e81884034ff1f03cfee@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r9e9f1a7609760f0f80562eaaec2aa3c32d525c3e0fca98b475240c71@%3Cdev.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/ra4da876037477c06f2677d7a1e10b5a8613000fca99c813958070fe9@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/rdf3e5d0a5f5c3d90d6013bccc6c4d5af59cf1f8c8dea5d9a283d13ce@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/rfed9fea918e090383da33e393eb6c2755fccf05032bd7d6eb4737c9e@%3Ccvs.httpd.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4NKWG2EXAQQB6LMLATKZ7KLSRGCSHVAN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ITVFDBVM6E3JF3O7RYLRPRCH3RDRHJJY/
- https://security.gentoo.org/glsa/202008-04
- https://security.netapp.com/advisory/ntap-20200814-0005/
- https://usn.ubuntu.com/4458-1/
- https://www.debian.org/security/2020/dsa-4757
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://launchpad.net/bugs/cve/CVE-2020-9490
- https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r09bb998baee74a2c316446bd1a41ae7f8d7049d09d9ff991471e8775%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r0b6541c5fb2f8fb383861333400add7def625bc993300300de0b4f8d%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r3c5c3104813c1c5508b55564b66546933079250a46ce50eee90b2e36%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r5debe8f82728a00a4a68bc904dd6c35423bdfc8d601cfb4579f38bf1%40%3Cdev.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r623de9b2b2433a87f3f3a15900419fc9c00c77b26936dfea4060f672%40%3Cdev.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r97d0faab6ed8fd0d439234b16d05d77b22a07b0c4817e7b3cca419cc%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r9e485ce5a01c9dc3d4d785a7d28aa7400ead1e81884034ff1f03cfee%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r9e9f1a7609760f0f80562eaaec2aa3c32d525c3e0fca98b475240c71%40%3Cdev.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/ra4da876037477c06f2677d7a1e10b5a8613000fca99c813958070fe9%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/rdf3e5d0a5f5c3d90d6013bccc6c4d5af59cf1f8c8dea5d9a283d13ce%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/rfed9fea918e090383da33e393eb6c2755fccf05032bd7d6eb4737c9e%40%3Ccvs.httpd.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NKWG2EXAQQB6LMLATKZ7KLSRGCSHVAN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVFDBVM6E3JF3O7RYLRPRCH3RDRHJJY/
- https://www.openwall.com/lists/oss-security/2020/08/07/4
- https://svn.apache.org/r1880396
- https://github.com/apache/httpd/commit/a61223e9cb906110f35ec144b93fee9eb80ad6e4
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2030
- https://security-tracker.debian.org/tracker/CVE-2020-9490
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9490
- https://nvd.nist.gov/vuln/detail/CVE-2020-9490
- https://ubuntu.com/security/CVE-2020-9490
Frequently Asked Questions
What is the severity of CVE-2020-9490?
CVE-2020-9490 has a severity level that can cause a crash in affected Apache HTTP Server instances.
How do I fix CVE-2020-9490?
To mitigate CVE-2020-9490, configure the HTTP/2 feature by setting 'H2Push off' in your Apache HTTP Server configuration.
Which versions of Apache HTTP Server are affected by CVE-2020-9490?
Apache HTTP Server versions 2.4.20 to 2.4.43 are impacted by CVE-2020-9490.
What are the potential consequences of exploiting CVE-2020-9490?
Exploiting CVE-2020-9490 can lead to unexpected crashes of the Apache HTTP Server.
Is there a permanent patch for CVE-2020-9490?
While there is no specific patch, applying the mitigation by disabling HTTP/2 push can prevent its exploitation.
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