Vulnerability-Lookup

CNVD-2021-31262

Vulnerability from cnvd - Published: 2021-04-27

Title

Nghttp2存在未明漏洞

Description

Nghttp2是Nghttp2社区的一个用于实现HTTP/2的C库。 Nghttp2 1.41.0之前版本中存在安全漏洞，攻击者可借助恶意的客户端构建14,400字节长度的SETTINGS帧利用该漏洞造成拒绝服务。

Severity

中

Patch Name

Nghttp2存在未明漏洞的补丁

Patch Description

Nghttp2是Nghttp2社区的一个用于实现HTTP/2的C库。 Nghttp2 1.41.0之前版本中存在安全漏洞，攻击者可借助恶意的客户端构建14,400字节长度的SETTINGS帧利用该漏洞造成拒绝服务。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-11080

Impacted products

Name
Nghttp2 Nghttp2 <1.41.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-11080"
    }
  },
  "description": "Nghttp2\u662fNghttp2\u793e\u533a\u7684\u4e00\u4e2a\u7528\u4e8e\u5b9e\u73b0HTTP/2\u7684C\u5e93\u3002\n\nNghttp2 1.41.0\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u501f\u52a9\u6076\u610f\u7684\u5ba2\u6237\u7aef\u6784\u5efa14,400\u5b57\u8282\u957f\u5ea6\u7684SETTINGS\u5e27\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-31262",
  "openTime": "2021-04-27",
  "patchDescription": "Nghttp2\u662fNghttp2\u793e\u533a\u7684\u4e00\u4e2a\u7528\u4e8e\u5b9e\u73b0HTTP/2\u7684C\u5e93\u3002\r\n\r\nNghttp2 1.41.0\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u501f\u52a9\u6076\u610f\u7684\u5ba2\u6237\u7aef\u6784\u5efa14,400\u5b57\u8282\u957f\u5ea6\u7684SETTINGS\u5e27\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Nghttp2\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Nghttp2 Nghttp2 \u003c1.41.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-11080",
  "serverity": "\u4e2d",
  "submitTime": "2020-06-04",
  "title": "Nghttp2\u5b58\u5728\u672a\u660e\u6f0f\u6d1e"
}

CVE-2020-11080 (GCVE-0-2020-11080)

Vulnerability from cvelistv5 – Published: 2020-06-03 00:00 – Updated: 2025-06-09 15:45

Title

Denial of service in nghttp2

Summary

In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.

Severity

3.7 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-09 15:44 UTC

CWE

CWE-707 - Improper Enforcement of Message or Data Structure

Assigner

GitHub_M mitre root

References

14 references

URL	Tags
https://www.debian.org/security/2020/dsa-4696	vendor-advisory
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://www.oracle.com/security-alerts/cpujul2020.html
https://github.com/nghttp2/nghttp2/security/advis…
https://github.com/nghttp2/nghttp2/commit/336a98f…
https://github.com/nghttp2/nghttp2/commit/f8da73b…
https://www.oracle.com/security-alerts/cpuoct2020.html
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://www.oracle.com/security-alerts/cpujan2021.html
https://www.oracle.com//security-alerts/cpujul2021.html
https://lists.debian.org/debian-lts-announce/2021…	mailing-list
https://www.oracle.com/security-alerts/cpuapr2022.html
https://lists.debian.org/debian-lts-announce/2023…	mailing-list

Impacted products

1 product

Vendor	Product	Version
nghttp2	nghttp2	Affected: < 1.41.0

Show details on NVD website

JSON

To clipboard

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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.

Detection rules are retrieved from Rulezet.

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.

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.