CVE-2017-9789 (GCVE-0-2017-9789)
Vulnerability from cvelistv5 – Published: 2017-07-13 16:00 – Updated: 2024-09-16 20:22
VLAI
EPSS
VEX
Summary
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.
Severity
7.5 (High)
CWE
- Read after free in mod_http2
Assigner
References
22 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.26
|
guessed |
Date Public
2017-07-13 00:00
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"cveId": "CVE-2017-9789",
"datePublished": "2017-07-13T16:00:00.000Z",
"dateReserved": "2017-06-21T00:00:00.000Z",
"dateUpdated": "2024-09-16T20:22:58.028Z",
"state": "PUBLISHED"
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"date": "2026-09-16",
"epss": "0.09584",
"percentile": "0.95216"
},
"fkie_nvd": {
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"id": "CVE-2017-9789",
"lastModified": "2024-11-21T03:36:51.323",
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"published": "2017-07-13T16:29:00.257",
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"sourceIdentifier": "security@apache.org",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
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"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-08-04T18:35:54+00:00",
"cve": "CVE-2017-9789",
"id": "CVE-2017-9789",
"initial_release_date": "2017-07-11T00:00:00+00:00",
"product_status:known_not_affected": "40",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "httpd: Read after free in mod_http2",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2017/cve-2017-9789.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "low",
"current_release_date": "2026-08-07T00:29:29Z",
"cve": "CVE-2017-9789",
"id": "CVE-2017-9789",
"initial_release_date": "2023-02-15T04:44:22Z",
"product_status:known_not_affected": "63",
"product_status:recommended": "87",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2017-9789",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2017-9789.json",
"version": "13"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- 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.
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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