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OESA-2023-1771 (CVE-2023-44487)
Vulnerability from osv_openeuler – Published: 2023-10-28 11:06 – Updated: 2026-08-06 11:06 – Source website
VLAI
Summary
nghttp2 security update
Details
The framing layer of HTTP/2 is implemented as a form of reusable C library. On top of that, we have implemented HTTP/2 client, server and proxy. We have also developed load test and benchmarking tool for HTTP/2.
Security Fix(es):
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.(CVE-2023-44487)
Severity
7.5 (High)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
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]
},
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},
"ranges": [
{
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{
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},
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},
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{
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},
{
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}
]
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],
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"nghttp2-help-1.46.0-5.oe2203sp1.noarch.rpm",
"nghttp2-help-1.46.0-5.oe2203sp2.noarch.rpm"
],
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"nghttp2-1.46.0-4.oe2203.x86_64.rpm",
"nghttp2-debugsource-1.46.0-5.oe2203sp1.x86_64.rpm",
"nghttp2-debuginfo-1.46.0-5.oe2203sp1.x86_64.rpm",
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]
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},
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]
},
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"nghttp2-1.46.0-5.oe2203sp1.x86_64.rpm",
"libnghttp2-devel-1.46.0-5.oe2203sp1.x86_64.rpm"
]
},
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"purl": "pkg:rpm/openEuler/nghttp2\u0026distro=openEuler-22.03-LTS-SP1"
},
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]
},
"package": {
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"name": "nghttp2",
"purl": "pkg:rpm/openEuler/nghttp2\u0026distro=openEuler-22.03-LTS-SP2"
},
"ranges": [
{
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{
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},
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}
],
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}
]
}
],
"database_specific": {
"severity": "High"
},
"details": "The framing layer of HTTP/2 is implemented as a form of reusable C library. On top of that, we have implemented HTTP/2 client, server and proxy. We have also developed load test and benchmarking tool for HTTP/2.\r\n\r\nSecurity Fix(es):\r\n\r\nThe HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.(CVE-2023-44487)",
"id": "OESA-2023-1771",
"modified": "2026-08-06T11:06:13Z",
"published": "2023-10-28T11:06:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1771"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-44487"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "nghttp2 security update",
"upstream": [
"CVE-2023-44487"
]
}
CVE-2023-44487 (GCVE-0-2023-44487)
Vulnerability from cvelistv5 – Published: 2023-10-10 00:00 – Updated: 2026-07-14 12:03
VLAI
EPSS
VEX
Summary
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
Severity
7.5 (High)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-23 20:34 UTC
CWE
- n/a
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
173 references
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| ietf | http |
Affected:
2.0
cpe:2.3:a:ietf:http:2.0:*:*:*:*:*:*:* |
|
| Siemens | RUGGEDCOM APE1808 |
Affected:
0 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SINEC NMS |
Affected:
0 , < V3.0
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
{
"containers": {
"adp": [
{
"affected": [
{
"cpes": [
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],
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"product": "http",
"vendor": "ietf",
"versions": [
{
"status": "affected",
"version": "2.0"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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}
},
{
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},
{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2024-07-23T20:34:21.334116Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2023-10-10",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-44487"
},
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}
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],
"problemTypes": [
{
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],
"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
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},
{
"name": "GLSA-202311-09",
"tags": [
"vendor-advisory"
],
"url": "https://security.gentoo.org/glsa/202311-09"
},
{
"name": "DSA-5570",
"tags": [
"vendor-advisory"
],
"url": "https://www.debian.org/security/2023/dsa-5570"
},
{
"url": "https://security.netapp.com/advisory/ntap-20240426-0007/"
},
{
"url": "https://security.netapp.com/advisory/ntap-20240621-0006/"
},
{
"url": "https://security.netapp.com/advisory/ntap-20240621-0007/"
},
{
"url": "https://github.com/grpc/grpc/releases/tag/v1.59.2"
},
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http2-reset-d8Kf32vZ"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2023-44487",
"datePublished": "2023-10-10T00:00:00.000Z",
"dateReserved": "2023-09-29T00:00:00.000Z",
"dateUpdated": "2026-07-14T12:03:17.389Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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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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