High severity · published Aug 7, 2020
CVE-2020-11993
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…
7.5
CVSS
56.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)56.4% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
HTTP Server · Apache
2.4.20 before 2.4.44 · source: NVD
CD
Clustered Data Ontap · Netapp
All versions, or not specified · source: NVD
CE
Communications Element Manager · Oracle
8.2.0 through 8.2.2 · source: NVD
CS
Communications Session Report Manager · Oracle
8.2.0 through 8.2.2 · source: NVD
CS
Communications Session Route Manager · Oracle
8.2.0 through 8.2.2 · source: NVD
DL
Debian Linux · Debian
10.0 · source: NVD
EM
Enterprise Manager Ops Center · Oracle
12.4.0.0 · source: NVD
FE
Fedora · Fedoraproject
31; 32 · source: NVD
HI
Hyperion Infrastructure Technology · Oracle
11.1.2.4 · source: NVD
IE
Instantis Enterprisetrack · Oracle
17.1; 17.2; 17.3 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-11993
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-11993
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-Pool-Usage.html
Vendor Advisory
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-11993
Patch
https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E
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