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.
Published 2017-07-13 16:29:00
Updated 2021-06-06 11:15:21
View at NVD,   CVE.org

Threat overview for CVE-2017-9789

Top countries where our scanners detected CVE-2017-9789
Top open port discovered on systems with this issue 80
IPs affected by CVE-2017-9789 6,301
Threat actors abusing to this issue? Yes
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Exploit prediction scoring system (EPSS) score for CVE-2017-9789

3.76%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 91 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2017-9789

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
NIST
7.5
HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
NIST

CWE ids for CVE-2017-9789

  • Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2017-9789

Products affected by CVE-2017-9789

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