CVE-2021-26717
Vulnerability from cvelistv5
Published
2021-02-18 19:39
Modified
2024-08-03 20:33
Severity ?
Summary
An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream, then Asterisk would crash.
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T20:33:40.586Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://downloads.asterisk.org/pub/security/"
          },
          {
            "name": "20210218 AST-2021-002: Remote crash possible when negotiating T.38",
            "tags": [
              "mailing-list",
              "x_refsource_FULLDISC",
              "x_transferred"
            ],
            "url": "http://seclists.org/fulldisclosure/2021/Feb/58"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://downloads.asterisk.org/pub/security/AST-2021-002.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://issues.asterisk.org/jira/browse/ASTERISK-29203"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream, then Asterisk would crash."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-02-19T15:06:09",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://downloads.asterisk.org/pub/security/"
        },
        {
          "name": "20210218 AST-2021-002: Remote crash possible when negotiating T.38",
          "tags": [
            "mailing-list",
            "x_refsource_FULLDISC"
          ],
          "url": "http://seclists.org/fulldisclosure/2021/Feb/58"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://downloads.asterisk.org/pub/security/AST-2021-002.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://issues.asterisk.org/jira/browse/ASTERISK-29203"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-26717",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream, then Asterisk would crash."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://downloads.asterisk.org/pub/security/",
              "refsource": "MISC",
              "url": "https://downloads.asterisk.org/pub/security/"
            },
            {
              "name": "20210218 AST-2021-002: Remote crash possible when negotiating T.38",
              "refsource": "FULLDISC",
              "url": "http://seclists.org/fulldisclosure/2021/Feb/58"
            },
            {
              "name": "https://downloads.asterisk.org/pub/security/AST-2021-002.html",
              "refsource": "CONFIRM",
              "url": "https://downloads.asterisk.org/pub/security/AST-2021-002.html"
            },
            {
              "name": "https://issues.asterisk.org/jira/browse/ASTERISK-29203",
              "refsource": "CONFIRM",
              "url": "https://issues.asterisk.org/jira/browse/ASTERISK-29203"
            },
            {
              "name": "http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-26717",
    "datePublished": "2021-02-18T19:39:46",
    "dateReserved": "2021-02-05T00:00:00",
    "dateUpdated": "2024-08-03T20:33:40.586Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-26717\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2021-02-18T20:15:12.667\",\"lastModified\":\"2024-11-21T05:56:44.287\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream, then Asterisk would crash.\"},{\"lang\":\"es\",\"value\":\"Se detect\u00f3 un problema en Sangoma Asterisk versiones 16.x anteriores a 16.16.1, versiones 17.x anteriores a 17.9.2 y versiones 18.x anteriores a 18.2.1 y Certified Asterisk versiones anteriores a  16.8-cert6.\u0026#xa0;Al renegociar para T.38, si la respuesta remota inicial se retras\u00f3 lo suficiente, Asterisk enviar\u00eda tanto audio como T.38 en el SDP.\u0026#xa0;Si esto sucediera, y el control remoto respondiera con una transmisi\u00f3n T.38 rechazada, entonces Asterisk podr\u00eda bloquearse\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"16.0.0\",\"versionEndExcluding\":\"16.16.1\",\"matchCriteriaId\":\"7382B641-0396-456F-BF33-3F6412E35F2D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"17.0.0\",\"versionEndExcluding\":\"17.9.2\",\"matchCriteriaId\":\"C5BA8606-ADA9-4841-A7E2-A9165138849A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"18.0\",\"versionEndExcluding\":\"18.2.1\",\"matchCriteriaId\":\"F10CB148-DF9C-4134-A417-3B111C036E20\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"81C3E390-8B99-4EB8-82DD-02893611209A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17DB2297-1908-4F87-8046-2BAA74569D71\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"CEA2CC40-C2F6-4828-82F0-1B50D3E61F77\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"32F19F43-C1E8-4B6C-9356-AF355B7320BD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"21D1FA32-B441-485F-8AE9-F3A394626909\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert2:*:*:*:*:*:*\",\"matchCriteriaId\":\"F7795CCF-B160-4B4F-9529-1192C11D7FDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert3:*:*:*:*:*:*\",\"matchCriteriaId\":\"0C5E5D0D-9EB3-40FD-8B7E-E93A95D07AB1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert4:*:*:*:*:*:*\",\"matchCriteriaId\":\"C7DFDA30-DD61-4BBC-AFE4-448BF2A4F303\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"142F1F89-49AC-4A0B-A273-61F697063A5A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"53041795-788C-4914-A2F6-41539ABE0244\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"FBB98E65-B2D0-49A4-8BF3-12155E3E13C9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"769C854C-03CD-40A9-B39B-C0CDCA8252EA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:digium:certified_asterisk:16.8:cert5:*:*:*:*:*:*\",\"matchCriteriaId\":\"6D86AD6E-4E07-48B0-88D8-E18F277FFE6A\"}]}]}],\"references\":[{\"url\":\"http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"http://seclists.org/fulldisclosure/2021/Feb/58\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://downloads.asterisk.org/pub/security/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://downloads.asterisk.org/pub/security/AST-2021-002.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://issues.asterisk.org/jira/browse/ASTERISK-29203\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\",\"Patch\",\"Vendor Advisory\"]},{\"url\":\"http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"http://seclists.org/fulldisclosure/2021/Feb/58\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://downloads.asterisk.org/pub/security/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://downloads.asterisk.org/pub/security/AST-2021-002.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://issues.asterisk.org/jira/browse/ASTERISK-29203\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Patch\",\"Vendor Advisory\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.