Vulnerability-Lookup

CNVD-2020-40736

Vulnerability from cnvd - Published: 2020-07-17

Title

OpenConnect缓冲区溢出漏洞

Description

OpenConnect是一款用于连接虚拟专用网络的开源应用程序。 OpenConnect 8.09版本中存在缓冲区溢出漏洞。攻击者可通过发送特制证书数据到gnutls.c文件中的get_cert_name利用该漏洞导致拒绝服务（应用程序崩溃）。

Severity

高

Patch Name

OpenConnect缓冲区溢出漏洞的补丁

Patch Description

OpenConnect是一款用于连接虚拟专用网络的开源应用程序。 OpenConnect 8.09版本中存在缓冲区溢出漏洞。攻击者可通过发送特制证书数据到gnutls.c文件中的get_cert_name利用该漏洞导致拒绝服务（应用程序崩溃）。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

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://gitlab.com/openconnect/openconnect/-/merge_requests/108

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-12823

Impacted products

Name
Openconnect OpenConnect 8.09

Show details on source website

JSON

To clipboard

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-12823"
    }
  },
  "description": "OpenConnect\u662f\u4e00\u6b3e\u7528\u4e8e\u8fde\u63a5\u865a\u62df\u4e13\u7528\u7f51\u7edc\u7684\u5f00\u6e90\u5e94\u7528\u7a0b\u5e8f\u3002\n\nOpenConnect 8.09\u7248\u672c\u4e2d\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u53d1\u9001\u7279\u5236\u8bc1\u4e66\u6570\u636e\u5230gnutls.c\u6587\u4ef6\u4e2d\u7684get_cert_name\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\uff08\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\uff09\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://gitlab.com/openconnect/openconnect/-/merge_requests/108",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-40736",
  "openTime": "2020-07-17",
  "patchDescription": "OpenConnect\u662f\u4e00\u6b3e\u7528\u4e8e\u8fde\u63a5\u865a\u62df\u4e13\u7528\u7f51\u7edc\u7684\u5f00\u6e90\u5e94\u7528\u7a0b\u5e8f\u3002\r\n\r\nOpenConnect 8.09\u7248\u672c\u4e2d\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u53d1\u9001\u7279\u5236\u8bc1\u4e66\u6570\u636e\u5230gnutls.c\u6587\u4ef6\u4e2d\u7684get_cert_name\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\uff08\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\uff09\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": "OpenConnect\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Openconnect OpenConnect 8.09"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-12823",
  "serverity": "\u9ad8",
  "submitTime": "2020-05-14",
  "title": "OpenConnect\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2020-12823 (GCVE-0-2020-12823)

Vulnerability from cvelistv5 – Published: 2020-05-12 17:07 – Updated: 2024-08-04 12:04

Summary

OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other impact, via crafted certificate data to get_cert_name in gnutls.c.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

9 references

URL	Tags
https://gitlab.com/openconnect/openconnect/-/merg…	x_refsource_MISC
https://bugs.gentoo.org/721570	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202006-15	vendor-advisoryx_refsource_GENTOO
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE

Show details on NVD website

JSON

To clipboard

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            "name": "[debian-lts-announce] 20200516 [SECURITY] [DLA 2212-1] openconnect security update",
            "tags": [
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        },
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          "tags": [
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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

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