CVE-2020-11993

high-risk
Published 2020-08-07

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.

Do I need to act?

!
33.4% chance of exploitation in next 30 days
EPSS score — higher than 67% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (19)

Affected Vendors

Debian Apache Oracle Canonical Fedoraproject Netapp Opensuse

References (52)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00068.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00071.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00081.html
Exploit http://packetstormsecurity.com/files/160393/Apache-2-HTTP2-Module-Concurrent-Poo...
Vendor Advisory https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-11993
Patch https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda...
Patch https://lists.apache.org/thread.html/r09bb998baee74a2c316446bd1a41ae7f8d7049d09d...
Patch https://lists.apache.org/thread.html/r2c6083f6a2027914a0f5b54e2a1f4fa98c03f8693b...
Patch https://lists.apache.org/thread.html/r3c5c3104813c1c5508b55564b66546933079250a46...
Patch https://lists.apache.org/thread.html/r5debe8f82728a00a4a68bc904dd6c35423bdfc8d60...
Patch https://lists.apache.org/thread.html/r623de9b2b2433a87f3f3a15900419fc9c00c77b269...
Patch https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37...
Patch https://lists.apache.org/thread.html/r9e9f1a7609760f0f80562eaaec2aa3c32d525c3e0f...
Patch https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f8...
Patch https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa...
Patch https://lists.apache.org/thread.html/rdf3e5d0a5f5c3d90d6013bccc6c4d5af59cf1f8c8d...
Patch https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90b...
Patch https://lists.apache.org/thread.html/rf71eb428714374a6f9ad68952e23611ec7807b029f...
Third Party Advisory https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Third Party Advisory https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
and 32 more references
61
/ 100
high-risk
Severity 26/34 · High
Exploitability 16/34 · Moderate
Exposure 19/34 · Moderate