CVE-2020-11993

Public Exploit

Description

Apache HTTP Server versions 2.4.20 to 2.4.43 When trace/debug was enabled for the HTTP/2 module and on certain traffic edge patterns, logging statements were made on the wrong connection, causing concurrent use of memory pools. Configuring the LogLevel of mod_http2 above "info" will mitigate this vulnerability for unpatched servers.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 38.85% Top 5%
Vendor Advisory gentoo.org Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory apache.org Vendor Advisory oracle.com
Affected: n/a Apache HTTP Server
Published at:
Updated at:

References

Link Tags
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-11993 vendor advisory
https://security.gentoo.org/glsa/202008-04 third party advisory vendor advisory
https://lists.apache.org/thread.html/r9e9f1a7609760f0f80562eaaec2aa3c32d525c3e0fca98b475240c71%40%3Cdev.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/r5debe8f82728a00a4a68bc904dd6c35423bdfc8d601cfb4579f38bf1%40%3Cdev.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/r623de9b2b2433a87f3f3a15900419fc9c00c77b26936dfea4060f672%40%3Cdev.httpd.apache.org%3E mailing list patch
https://usn.ubuntu.com/4458-1/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NKWG2EXAQQB6LMLATKZ7KLSRGCSHVAN/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVFDBVM6E3JF3O7RYLRPRCH3RDRHJJY/ third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00068.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00071.html mailing list third party advisory vendor advisory
https://www.debian.org/security/2020/dsa-4757 third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpuoct2020.html vendor advisory
https://security.netapp.com/advisory/ntap-20200814-0005/ third party advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00081.html mailing list third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpujan2021.html third party advisory
http://packetstormsecurity.com/files/160393/Apache-2-HTTP2-Module-Concurrent-Pool-Usage.html exploit vdb entry third party advisory
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/r09bb998baee74a2c316446bd1a41ae7f8d7049d09d9ff991471e8775%40%3Ccvs.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/rdf3e5d0a5f5c3d90d6013bccc6c4d5af59cf1f8c8dea5d9a283d13ce%40%3Ccvs.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/r3c5c3104813c1c5508b55564b66546933079250a46ce50eee90b2e36%40%3Ccvs.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/rf71eb428714374a6f9ad68952e23611ec7807b029fd6a1b4f5f732d9%40%3Ccvs.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/r2c6083f6a2027914a0f5b54e2a1f4fa98c03f8693b58460911818255%40%3Ccvs.httpd.apache.org%3E mailing list patch
https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E mailing list patch

Frequently Asked Questions

What is the severity of CVE-2020-11993?
CVE-2020-11993 has been scored as a high severity vulnerability.
How to fix CVE-2020-11993?
To fix CVE-2020-11993, 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-2020-11993 being actively exploited in the wild?
It is possible that CVE-2020-11993 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~39% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-11993?
CVE-2020-11993 affects n/a Apache HTTP Server.
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