Vulnerability-Lookup

CNVD-2020-28757

Vulnerability from cnvd - Published: 2020-05-18

Title

Pulseaudio访问控制绕过漏洞

Description

PulseAudio是一款用于POSIX OS的开源音频系统。该系统主要用于音频传输等。 PulseAudio中存在安全漏洞。攻击者可利用该漏洞绕过访问控制并记录音频。

Severity

低

Formal description

目前厂商暂未发布修复措施解决此安全问题，建议使用此软件的用户随时关注厂商主页或参考网址以获取解决办法：

https://www.freedesktop.org/wiki/Software/PulseAudio/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-11931

Impacted products

Name
Pulseaudio Pulseaudio

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-11931"
    }
  },
  "description": "PulseAudio\u662f\u4e00\u6b3e\u7528\u4e8ePOSIX OS\u7684\u5f00\u6e90\u97f3\u9891\u7cfb\u7edf\u3002\u8be5\u7cfb\u7edf\u4e3b\u8981\u7528\u4e8e\u97f3\u9891\u4f20\u8f93\u7b49\u3002\n\nPulseAudio\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u8bbf\u95ee\u63a7\u5236\u5e76\u8bb0\u5f55\u97f3\u9891\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u6682\u672a\u53d1\u5e03\u4fee\u590d\u63aa\u65bd\u89e3\u51b3\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u5efa\u8bae\u4f7f\u7528\u6b64\u8f6f\u4ef6\u7684\u7528\u6237\u968f\u65f6\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u6216\u53c2\u8003\u7f51\u5740\u4ee5\u83b7\u53d6\u89e3\u51b3\u529e\u6cd5\uff1a\r\n\r\nhttps://www.freedesktop.org/wiki/Software/PulseAudio/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-28757",
  "openTime": "2020-05-18",
  "products": {
    "product": "Pulseaudio Pulseaudio"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-11931",
  "serverity": "\u4f4e",
  "submitTime": "2020-05-18",
  "title": "Pulseaudio\u8bbf\u95ee\u63a7\u5236\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2020-11931 (GCVE-0-2020-11931)

Vulnerability from cvelistv5 – Published: 2020-05-15 03:25 – Updated: 2024-09-17 00:41

Title

Ubuntu modifications to pulseaudio to provide snap security enforcement could be unloaded

Summary

An Ubuntu-specific modification to Pulseaudio to provide security mediation for Snap-packaged applications was found to have a bypass of intended access restriction for snaps which plugs any of pulseaudio, audio-playback or audio-record via unloading the pulseaudio snap policy module. This issue affects: pulseaudio 1:8.0 versions prior to 1:8.0-0ubuntu3.12; 1:11.1 versions prior to 1:11.1-1ubuntu7.7; 1:13.0 versions prior to 1:13.0-1ubuntu1.2; 1:13.99.1 versions prior to 1:13.99.1-1ubuntu3.2;

Severity

3.3 (Low)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-284 - Improper Access Control

Assigner

canonical mitre root

References

2 references

URL	Tags
https://forum.snapcraft.io/t/audio-switcher-pulse…	x_refsource_MISC
https://usn.ubuntu.com/4355-1/	vendor-advisoryx_refsource_UBUNTU

Impacted products

1 product

Vendor	Product	Version
Canonical	pulseaudio	Affected: 1:8.0 , < 1:8.0-0ubuntu3.12 (custom) Affected: 1:11.1 , < 1:11.1-1ubuntu7.7 (custom) Affected: 1:13.0 , < 1:13.0-1ubuntu1.2 (custom) Affected: 1:13.99.1 , < 1:13.99.1-1ubuntu3.2 (custom)

Date Public

2020-04-16 00:00

Credits

James Henstridge

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T11:42:00.531Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://forum.snapcraft.io/t/audio-switcher-pulseaudio-interface-auto-connect-request/16648/3"
          },
          {
            "name": "USN-4355-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4355-1/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "pulseaudio",
          "vendor": "Canonical",
          "versions": [
            {
              "lessThan": "1:8.0-0ubuntu3.12",
              "status": "affected",
              "version": "1:8.0",
              "versionType": "custom"
            },
            {
              "lessThan": "1:11.1-1ubuntu7.7",
              "status": "affected",
              "version": "1:11.1",
              "versionType": "custom"
            },
            {
              "lessThan": "1:13.0-1ubuntu1.2",
              "status": "affected",
              "version": "1:13.0",
              "versionType": "custom"
            },
            {
              "lessThan": "1:13.99.1-1ubuntu3.2",
              "status": "affected",
              "version": "1:13.99.1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "James Henstridge"
        }
      ],
      "datePublic": "2020-04-16T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "An Ubuntu-specific modification to Pulseaudio to provide security mediation for Snap-packaged applications was found to have a bypass of intended access restriction for snaps which plugs any of pulseaudio, audio-playback or audio-record via unloading the pulseaudio snap policy module. This issue affects: pulseaudio 1:8.0 versions prior to 1:8.0-0ubuntu3.12; 1:11.1 versions prior to 1:11.1-1ubuntu7.7; 1:13.0 versions prior to 1:13.0-1ubuntu1.2; 1:13.99.1 versions prior to 1:13.99.1-1ubuntu3.2;"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 3.3,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284 Improper Access Control",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-05-18T18:06:14.000Z",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://forum.snapcraft.io/t/audio-switcher-pulseaudio-interface-auto-connect-request/16648/3"
        },
        {
          "name": "USN-4355-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4355-1/"
        }
      ],
      "source": {
        "advisory": "https://usn.ubuntu.com/usn/usn-4355-1",
        "defect": [
          "https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1877102"
        ],
        "discovery": "INTERNAL"
      },
      "title": "Ubuntu modifications to pulseaudio to provide snap security enforcement could be unloaded",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@ubuntu.com",
          "DATE_PUBLIC": "2020-04-16T00:00:00.000Z",
          "ID": "CVE-2020-11931",
          "STATE": "PUBLIC",
          "TITLE": "Ubuntu modifications to pulseaudio to provide snap security enforcement could be unloaded"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "pulseaudio",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_name": "1:8.0",
                            "version_value": "1:8.0-0ubuntu3.12"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "1:11.1",
                            "version_value": "1:11.1-1ubuntu7.7"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "1:13.0",
                            "version_value": "1:13.0-1ubuntu1.2"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "1:13.99.1",
                            "version_value": "1:13.99.1-1ubuntu3.2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Canonical"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "James Henstridge"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An Ubuntu-specific modification to Pulseaudio to provide security mediation for Snap-packaged applications was found to have a bypass of intended access restriction for snaps which plugs any of pulseaudio, audio-playback or audio-record via unloading the pulseaudio snap policy module. This issue affects: pulseaudio 1:8.0 versions prior to 1:8.0-0ubuntu3.12; 1:11.1 versions prior to 1:11.1-1ubuntu7.7; 1:13.0 versions prior to 1:13.0-1ubuntu1.2; 1:13.99.1 versions prior to 1:13.99.1-1ubuntu3.2;"
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 3.3,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-284 Improper Access Control"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://forum.snapcraft.io/t/audio-switcher-pulseaudio-interface-auto-connect-request/16648/3",
              "refsource": "MISC",
              "url": "https://forum.snapcraft.io/t/audio-switcher-pulseaudio-interface-auto-connect-request/16648/3"
            },
            {
              "name": "USN-4355-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4355-1/"
            }
          ]
        },
        "source": {
          "advisory": "https://usn.ubuntu.com/usn/usn-4355-1",
          "defect": [
            "https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1877102"
          ],
          "discovery": "INTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2020-11931",
    "datePublished": "2020-05-15T03:25:11.587Z",
    "dateReserved": "2020-04-20T00:00:00.000Z",
    "dateUpdated": "2024-09-17T00:41:25.129Z",
    "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.

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

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.