CVE-2023-45802

Advisory lineage Upstream: 0 Downstream: 17
Analyzed
Published: 23 Oct 2023, 06:50
Last modified:14 Oct 2024, 09:01

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
5.9 MEDIUM
v3.1 (nvd)
EPSS Score
2.79% LOW
3% probability +0.63%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

23 Oct 2023, 06:50
Published
Vulnerability first disclosed
14 Oct 2024, 09:01
Last Modified
Vulnerability information updated

Description

When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open and causing the memory footprint to keep on growing. On connection close, all resources were reclaimed, but the process might run out of memory before that. This was found by the reporter during testing of CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During "normal" HTTP/2 use, the probability to hit this bug is very low. The kept memory would not become noticeable before the connection closes or times out. Users are recommended to upgrade to version 2.4.58, which fixes the issue.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 2.79%• Percentile: 86%

Techniques & Countermeasures

  • CWE-404•Improper Resource Shutdown or Release

    The product does not release or incorrectly releases a resource before it is made available for re-use.

Affected Systems

  • apache software foundation•apache http server

    ≥ 2.4.17, ≤ 2.4.57

  • Unknown•HTTP Server

    ≥ 2.4.17, < 2.4.58

  • debian•debian_linux

    10.0

  • fedoraproject•fedora

    37 | 38 | 39

References (6)