Vulnerability-Lookup

CNVD-2019-05102

Vulnerability from cnvd - Published: 2019-02-22

Title

LibVNC libvncserver/rfbserver.c文件堆越界写入漏洞（CNVD-2019-05102）

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 0.9.12之前版本中的libvncserver/rfbserver.c文件存在堆越界写入漏洞。攻击者可以利用漏洞在应用程序上下文中执行任意代码。失败的攻击尝试可能会导致拒绝服务条件。

Severity

高

Patch Name

LibVNC libvncserver/rfbserver.c文件堆越界写入漏洞（CNVD-2019-05102）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 0.9.12之前版本中的libvncserver/rfbserver.c文件存在堆越界写入漏洞。攻击者可以利用漏洞在应用程序上下文中执行任意代码。失败的攻击尝试可能会导致拒绝服务条件。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/commit/15bb719c03cc70f14c36a843dcb16ed69b405707

Reference

https://nvd.nist.gov/vuln/detail/CVE-2018-20749

Impacted products

Name
LibVNC LibVNC <0.9.12

Show details on source website

JSON

To clipboard

{
  "bids": {
    "bid": {
      "bidNumber": "106825"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-20749"
    }
  },
  "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 0.9.12\u4e4b\u524d\u7248\u672c\u4e2d\u7684libvncserver/rfbserver.c\u6587\u4ef6\u5b58\u5728\u5806\u8d8a\u754c\u5199\u5165\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u6f0f\u6d1e\u5728\u5e94\u7528\u7a0b\u5e8f\u4e0a\u4e0b\u6587\u4e2d\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002\u5931\u8d25\u7684\u653b\u51fb\u5c1d\u8bd5\u53ef\u80fd\u4f1a\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u6761\u4ef6\u3002",
  "discovererName": "Solar Designer",
  "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/commit/15bb719c03cc70f14c36a843dcb16ed69b405707",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-05102",
  "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 0.9.12\u4e4b\u524d\u7248\u672c\u4e2d\u7684libvncserver/rfbserver.c\u6587\u4ef6\u5b58\u5728\u5806\u8d8a\u754c\u5199\u5165\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u6f0f\u6d1e\u5728\u5e94\u7528\u7a0b\u5e8f\u4e0a\u4e0b\u6587\u4e2d\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002\u5931\u8d25\u7684\u653b\u51fb\u5c1d\u8bd5\u53ef\u80fd\u4f1a\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u6761\u4ef6\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 libvncserver/rfbserver.c\u6587\u4ef6\u5806\u8d8a\u754c\u5199\u5165\u6f0f\u6d1e\uff08CNVD-2019-05102\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "LibVNC LibVNC \u003c0.9.12"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2018-20749",
  "serverity": "\u9ad8",
  "submitTime": "2019-01-31",
  "title": "LibVNC libvncserver/rfbserver.c\u6587\u4ef6\u5806\u8d8a\u754c\u5199\u5165\u6f0f\u6d1e\uff08CNVD-2019-05102\uff09"
}

CVE-2018-20749 (GCVE-0-2018-20749)

Vulnerability from cvelistv5 – Published: 2019-01-30 18:00 – Updated: 2024-08-05 12:12

Summary

LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root Scorecard

References

10 references

URL	Tags
https://lists.debian.org/debian-lts-announce/2019…	mailing-listx_refsource_MLIST
http://www.securityfocus.com/bid/106825	vdb-entryx_refsource_BID
https://github.com/LibVNC/libvncserver/commit/15b…	x_refsource_MISC
https://github.com/LibVNC/libvncserver/issues/273	x_refsource_MISC
https://usn.ubuntu.com/3877-1/	vendor-advisoryx_refsource_UBUNTU
https://www.openwall.com/lists/oss-security/2018/…	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2019…	mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4547-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4587-1/	vendor-advisoryx_refsource_UBUNTU
https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM

Date Public

2019-01-30 00:00

Show details on NVD website

JSON

To clipboard

{
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        "references": [
          {
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            "url": "https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html"
          },
          {
            "name": "106825",
            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/106825"
          },
          {
            "tags": [
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            ],
            "url": "https://github.com/LibVNC/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69b405707"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/LibVNC/libvncserver/issues/273"
          },
          {
            "name": "USN-3877-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/3877-1/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2018/12/10/8"
          },
          {
            "name": "[debian-lts-announce] 20191030 [SECURITY] [DLA 1979-1] italc security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
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              "x_transferred"
            ],
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          }
        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
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      },
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        },
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          "url": "https://github.com/LibVNC/libvncserver/issues/273"
        },
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          "name": "USN-3877-1",
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          "url": "https://usn.ubuntu.com/3877-1/"
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          "url": "https://usn.ubuntu.com/4547-1/"
        },
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          "name": "USN-4587-1",
          "tags": [
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            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4587-1/"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf"
        }
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          "ID": "CVE-2018-20749",
          "STATE": "PUBLIC"
        },
        "affects": {
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              {
                "product": {
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                      "product_name": "n/a",
                      "version": {
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            },
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    "datePublished": "2019-01-30T18:00:00.000Z",
    "dateReserved": "2019-01-30T00:00:00.000Z",
    "dateUpdated": "2024-08-05T12:12:27.679Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

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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-2019-05102

CVE-2018-20749 (GCVE-0-2018-20749)

Tags

Sightings

Nomenclature

Related by attack behaviour