High severity · published Jul 13, 2017
CVE-2017-9789
When under stress, closing many connections, the HTTP/2 handling code in Apache httpd 2.4.26 would sometimes access memory after it has been freed, resulting in potentially…
7.5
CVSS
9.6%
EPSS
No
On KEV
Description
When under stress, closing many connections, the HTTP/2 handling code in Apache httpd 2.4.26 would sometimes access memory after it has been freed, resulting in potentially erratic behaviour.
CVSS vector
CVSS:3.0/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)9.6% · higher than 95% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
HTTP Server · Apache
2.4.26 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-9789
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-9789
Third Party Advisory
http://www.securityfocus.com/bid/99568
Third Party Advisory
http://www.securitytracker.com/id/1038907
Release Notes
https://httpd.apache.org/security/vulnerabilities_24.html
lists.apache.org
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E
lists.apache.org
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E
lists.apache.org
https://lists.apache.org/thread.html/9d0098775bd83cf7c33ac5a077ef412c14ce939198921e639c734e20%40%3Cannounce.httpd.apache.org%3E
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