Vulnerability-Lookup

(CVE-2023-45802)

Vulnerability from cleanstart – Published: 2026-10-09 00:49 – Updated: 2026-10-08 10:20 – Source website

Summary

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

Details

Security vulnerability affects the apache2 package. 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.

Severity

5.9 (Medium)


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

References

URL

Type

	https://github.com/cleanstart-dev/cleanstart-secu…	ADVISORY
	https://osv.dev/vulnerability/CVE-2023-45802	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2023-45802	WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "apache2",
        "purl": "pkg:apk/cleanstart/apache2"
      },
      "ranges": [
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          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.58-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Security vulnerability affects the apache2 package. When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request\u0027s memory resources were not reclaimed immediately.",
  "id": "CLEANSTART-2026-UI43314",
  "modified": "2026-10-08T10:20:39Z",
  "published": "2026-10-09T00:49:52.094137Z",
  "references": [
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    },
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      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2023-45802"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-45802"
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  ],
  "related": [],
  "schema_version": "1.7.3",
  "severity": [
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      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request\u0027s memory resources were not reclaimed immediately",
  "upstream": [
    "CVE-2023-45802"
  ]
}

CVE-2023-45802 (GCVE-0-2023-45802)

Vulnerability from cvelistv5 – Published: 2023-10-23 06:50 – Updated: 2024-10-14 09:01

Title

Apache HTTP Server: HTTP/2 stream memory not reclaimed right away on RST

Summary

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.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-12 18:03 UTC

CWE

CWE-404 - Improper Resource Shutdown or Release

Assigner

apache CNA under the mitre root

CNA scorecard B 76/100 over 936 records in the last 180 days details

References

6 references

URL	Tags
https://httpd.apache.org/security/vulnerabilities…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	x_transferred
https://security.netapp.com/advisory/ntap-2023102…	x_transferred
https://lists.fedoraproject.org/archives/list/pac…	x_transferred
https://lists.fedoraproject.org/archives/list/pac…	x_transferred
https://lists.debian.org/debian-lts-announce/2024…	x_transferred

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache HTTP Server	Affected: 2.4.17 , ≤ 2.4.57 (semver)

Credits

Will Dormann of Vul Labs David Warren of Vul Labs

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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(CVE-2023-45802)

CVE-2023-45802 (GCVE-0-2023-45802)

Tags

Sightings

Nomenclature

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