Vulnerability-Lookup

CNVD-2019-05097

Vulnerability from cnvd - Published: 2019-02-22

Title

LibVNC不当初始化漏洞

Description

LibVNC是一款用于实现VNC服务器和客户端功能的跨平台C库。 LibVNC 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838之前版本中的VNC客户端代码存在安全漏洞，该漏洞源于程序进行了不正确的初始化。攻击者可利用该漏洞读取栈内存并泄露信息。

Severity

中

Patch Name

LibVNC不当初始化漏洞的补丁

Patch Description

LibVNC是一款用于实现VNC服务器和客户端功能的跨平台C库。 LibVNC 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838之前版本中的VNC客户端代码存在安全漏洞，该漏洞源于程序进行了不正确的初始化。攻击者可利用该漏洞读取栈内存并泄露信息。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

厂商已发布漏洞修复程序，请及时关注更新： https://github.com/LibVNC/libvncserver

Reference

https://nvd.nist.gov/vuln/detail/CVE-2018-20022

Impacted products

Name
LibVNC LibVNC <2f5b2ad1c6c99b1ac6482c95844a84d66bb52838

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-20022"
    }
  },
  "description": "LibVNC\u662f\u4e00\u6b3e\u7528\u4e8e\u5b9e\u73b0VNC\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u529f\u80fd\u7684\u8de8\u5e73\u53f0C\u5e93\u3002\n\nLibVNC 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838\u4e4b\u524d\u7248\u672c\u4e2d\u7684VNC\u5ba2\u6237\u7aef\u4ee3\u7801\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u8fdb\u884c\u4e86\u4e0d\u6b63\u786e\u7684\u521d\u59cb\u5316\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u8bfb\u53d6\u6808\u5185\u5b58\u5e76\u6cc4\u9732\u4fe1\u606f\u3002",
  "discovererName": "unknwon",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/LibVNC/libvncserver",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-05097",
  "openTime": "2019-02-22",
  "patchDescription": "LibVNC\u662f\u4e00\u6b3e\u7528\u4e8e\u5b9e\u73b0VNC\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u529f\u80fd\u7684\u8de8\u5e73\u53f0C\u5e93\u3002\r\n\r\nLibVNC 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838\u4e4b\u524d\u7248\u672c\u4e2d\u7684VNC\u5ba2\u6237\u7aef\u4ee3\u7801\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u8fdb\u884c\u4e86\u4e0d\u6b63\u786e\u7684\u521d\u59cb\u5316\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u8bfb\u53d6\u6808\u5185\u5b58\u5e76\u6cc4\u9732\u4fe1\u606f\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": "LibVNC\u4e0d\u5f53\u521d\u59cb\u5316\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "LibVNC LibVNC \u003c2f5b2ad1c6c99b1ac6482c95844a84d66bb52838"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2018-20022",
  "serverity": "\u4e2d",
  "submitTime": "2018-12-20",
  "title": "LibVNC\u4e0d\u5f53\u521d\u59cb\u5316\u6f0f\u6d1e"
}

CVE-2018-20022 (GCVE-0-2018-20022)

Vulnerability from cvelistv5 – Published: 2018-12-19 16:00 – Updated: 2024-08-05 11:51

Summary

LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR

Severity

No CVSS data available.

CWE

Information disclosure

Assigner

Kaspersky mitre root

References

12 references

URL	Tags
https://www.debian.org/security/2019/dsa-4383	vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2018…	mailing-listx_refsource_MLIST
https://ics-cert.kaspersky.com/advisories/klcert-…	x_refsource_MISC
https://usn.ubuntu.com/3877-1/	vendor-advisoryx_refsource_UBUNTU
https://security.gentoo.org/glsa/201908-05	vendor-advisoryx_refsource_GENTOO
https://lists.debian.org/debian-lts-announce/2019…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019…	mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/202006-06	vendor-advisoryx_refsource_GENTOO
https://usn.ubuntu.com/4547-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4547-2/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4587-1/	vendor-advisoryx_refsource_UBUNTU

Impacted products

1 product

Vendor	Product	Version
n/a	LibVNC	Affected: commit 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838

Date Public

2018-12-19 00:00

Show details on NVD website

JSON

To clipboard

{
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          "dateUpdated": "2024-08-05T11:51:18.317Z",
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            "url": "https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-032-libvnc-multiple-memory-leaks/"
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            "url": "https://usn.ubuntu.com/4587-1/"
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        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
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          "url": "https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html"
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        {
          "name": "[debian-lts-announce] 20191030 [SECURITY] [DLA 1979-1] italc security update",
          "tags": [
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          "url": "https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html"
        },
        {
          "name": "[debian-lts-announce] 20191129 [SECURITY] [DLA 2016-1] ssvnc security update",
          "tags": [
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            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html"
        },
        {
          "name": "[debian-lts-announce] 20191221 [SECURITY] [DLA 2045-1] tightvnc security update",
          "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.

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.

Action not permitted

CNVD-2019-05097

CVE-2018-20022 (GCVE-0-2018-20022)

Tags

Sightings

Nomenclature

Related by attack behaviour