cnvd - cnvd-2018-20690

CNVD-2018-20690

Vulnerability from cnvd - Published: 2018-10-11

Title

Linux kernel信息泄露漏洞（CNVD-2018-20690）

Description

Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。 Linux kernel中的‘show_opcodes()’函数的callers存在信息泄露漏洞，该漏洞源于程序缺少地址检测，攻击者可利用该漏洞将任意内核地址上的内核内存转存到dmesg日志中。

Severity

低

Patch Name

Linux kernel信息泄露漏洞（CNVD-2018-20690）的补丁

Patch Description

Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。 Linux kernel中的‘show_opcodes()’函数的callers存在信息泄露漏洞，该漏洞源于程序缺少地址检测，攻击者可利用该漏洞将任意内核地址上的内核内存转存到dmesg日志中。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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=342db04ae71273322f0011384a9ed414df8bdae4

Reference

https://bugs.chromium.org/p/project-zero/issues/detail?id=1650 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14656 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=342db04ae71273322f0011384a9ed414df8bdae4 https://lore.kernel.org/lkml/20180828154901.112726-1-jannh@google.com/T/ https://seclists.org/oss-sec/2018/q4/9

Impacted products

Name
Linux Linux kernel

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-14656"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u4e2d\u7684\u2018show_opcodes()\u2019\u51fd\u6570\u7684callers\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u7f3a\u5c11\u5730\u5740\u68c0\u6d4b\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06\u4efb\u610f\u5185\u6838\u5730\u5740\u4e0a\u7684\u5185\u6838\u5185\u5b58\u8f6c\u5b58\u5230dmesg\u65e5\u5fd7\u4e2d\u3002",
  "discovererName": "Jann Horn",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=342db04ae71273322f0011384a9ed414df8bdae4",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-20690",
  "openTime": "2018-10-11",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u4e2d\u7684\u2018show_opcodes()\u2019\u51fd\u6570\u7684callers\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u7f3a\u5c11\u5730\u5740\u68c0\u6d4b\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06\u4efb\u610f\u5185\u6838\u5730\u5740\u4e0a\u7684\u5185\u6838\u5185\u5b58\u8f6c\u5b58\u5230dmesg\u65e5\u5fd7\u4e2d\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": "Linux kernel\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2018-20690\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel"
  },
  "referenceLink": "https://bugs.chromium.org/p/project-zero/issues/detail?id=1650\r\nhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14656\r\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=342db04ae71273322f0011384a9ed414df8bdae4\r\nhttps://lore.kernel.org/lkml/20180828154901.112726-1-jannh@google.com/T/\r\nhttps://seclists.org/oss-sec/2018/q4/9",
  "serverity": "\u4f4e",
  "submitTime": "2018-10-10",
  "title": "Linux kernel\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2018-20690\uff09"
}

CVE-2018-14656 (GCVE-0-2018-14656)

Vulnerability from cvelistv5 – Published: 2018-10-08 22:00 – Updated: 2024-08-05 09:38

Summary

A missing address check in the callers of the show_opcodes() in the Linux kernel allows an attacker to dump the kernel memory at an arbitrary kernel address into the dmesg log.

Severity ?

7 (High)


                        
                          CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-20

Assigner

redhat

References

URL

Tags

	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
	http://www.securitytracker.com/id/1041804	vdb-entryx_refsource_SECTRACK
	https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_CONFIRM
	https://lore.kernel.org/lkml/20180828154901.11272…	x_refsource_MISC
	https://seclists.org/oss-sec/2018/q4/9	x_refsource_MISC
	https://bugs.chromium.org/p/project-zero/issues/d…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	[UNKNOWN]	kernel	Affected: n/a

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T09:38:12.828Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14656"
          },
          {
            "name": "1041804",
            "tags": [
              "vdb-entry",
              "x_refsource_SECTRACK",
              "x_transferred"
            ],
            "url": "http://www.securitytracker.com/id/1041804"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
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            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=342db04ae71273322f0011384a9ed414df8bdae4"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://lore.kernel.org/lkml/20180828154901.112726-1-jannh%40google.com/T/"
          },
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://seclists.org/oss-sec/2018/q4/9"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=1650"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "kernel",
          "vendor": "[UNKNOWN]",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2018-09-13T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "A missing address check in the callers of the show_opcodes() in the Linux kernel allows an attacker to dump the kernel memory at an arbitrary kernel address into the dmesg log."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2018-10-09T09:57:01",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
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        },
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          "tags": [
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          ],
          "url": "http://www.securitytracker.com/id/1041804"
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        {
          "tags": [
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          ],
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        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=1650"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2018-14656",
    "datePublished": "2018-10-08T22:00:00",
    "dateReserved": "2018-07-27T00:00:00",
    "dateUpdated": "2024-08-05T09:38:12.828Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CNVD-2018-20690

CVE-2018-14656 (GCVE-0-2018-14656)

Tags

Sightings

Nomenclature