CVE-2017-9789

Advisory lineage Upstream: 0 Downstream: 3
Modified
Published: 13 Jul 2017, 16:00
Last modified:16 Sept 2024, 20:22

Vulnerability Summary

Overall Risk (default)
medium
32/100
CVSS Score
7.5 HIGH
v3.0 (nvd)
EPSS Score
10.12% MEDIUM
10% probability -1.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 Jul 2017, 16:00
Published
Vulnerability first disclosed
16 Sept 2024, 20:22
Last Modified
Vulnerability information updated

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 Metrics

  • v3.0•HIGH•Score: 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 10.12%• Percentile: 93%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • apache software foundation•apache http server

    2.4.26

  • Unknown•HTTP Server

    2.4.26

References (22)