Vulnerability-Lookup

CNVD-2020-36778

Vulnerability from cnvd - Published: 2020-07-07

Title

LibVNCServer缓冲区溢出漏洞（CNVD-2020-36778）

Description

LibVNCServer是一款支持在程序中实现VNC（虚拟网络计算）服务器或客户端功能的跨平台C语言库。 LibVNCServer 9.12之前版本中的websockets.c文件存在缓冲区溢出漏洞。该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。

Severity

高

Patch Name

LibVNCServer缓冲区溢出漏洞（CNVD-2020-36778）的补丁

Patch Description

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://github.com/LibVNC/libvncserver/commit/aac95a9dcf4bbba87b76c72706c3221a842ca433

Reference

https://nvd.nist.gov/vuln/detail/CVE-2017-18922

Impacted products

Name
LibVNCServer LibVNCServer <9.12

Show details on source website

JSON

To clipboard

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  "number": "CNVD-2020-36778",
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  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2017-18922",
  "serverity": "\u9ad8",
  "submitTime": "2020-07-01",
  "title": "LibVNCServer\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2020-36778\uff09"
}

CVE-2017-18922 (GCVE-0-2017-18922)

Vulnerability from cvelistv5 – Published: 2020-06-30 11:00 – Updated: 2024-08-05 21:45

Summary

It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

13 references

URL	Tags
https://github.com/LibVNC/libvncserver/commit/aac…	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2020/…	x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=1852356	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2020/06/30/3	mailing-listx_refsource_MLIST
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://usn.ubuntu.com/4407-1/	vendor-advisoryx_refsource_UBUNTU
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM

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.
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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.

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.

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Action not permitted

CNVD-2020-36778

CVE-2017-18922 (GCVE-0-2017-18922)

Tags

Sightings

Nomenclature

Related by attack behaviour