CVE-2020-11993

high

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.

References

https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-11993

https://security.gentoo.org/glsa/202008-04

https://lists.apache.org/thread.html/[email protected]%3Cdev.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Cdev.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Cdev.httpd.apache.org%3E

https://security.netapp.com/advisory/ntap-20200814-0005/

https://usn.ubuntu.com/4458-1/

https://lists.fedoraproject.org/archives/list/[email protected]/message/4NKWG2EXAQQB6LMLATKZ7KLSRGCSHVAN/

https://lists.fedoraproject.org/archives/list/[email protected]/message/ITVFDBVM6E3JF3O7RYLRPRCH3RDRHJJY/

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00068.html

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00071.html

https://www.debian.org/security/2020/dsa-4757

https://www.oracle.com/security-alerts/cpuoct2020.html

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00081.html

http://packetstormsecurity.com/files/160393/Apache-2-HTTP2-Module-Concurrent-Pool-Usage.html

https://www.oracle.com/security-alerts/cpujan2021.html

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E

Details

Source: MITRE

Published: 2020-08-07

Updated: 2021-06-06

Type: CWE-444

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH