CVE-2025-49832 (GCVE-0-2025-49832)

Vulnerability from cvelistv5 – Published: 2025-08-01 17:57 – Updated: 2025-08-01 18:29
VLAI?
Title
Asterisk is Vulnerable to Remote DoS and possible RCE Attacks During Memory Allocation
Summary
Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in `asterisk/res/res_stir_shaken /verification.c` that can be exploited when an attacker can set an arbitrary Identity header, or STIR/SHAKEN is enabled, with verification set in the SIP profile associated with the endpoint to be attacked. This is fixed in versions 18.26.3, 20.7-cert6, 20.15.1, 21.10.1 and 22.5.1.
Severity ?
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
asterisk asterisk Affected: < 18.26.3
Affected: >= 20.00.0, < 20.15.1
Affected: >= 21.00.0, < 21.10.1
Affected: >= 22.00.0, < 22.5.1
Affected: >= 20.7-cert6, < 20.7-cert7
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-49832",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-01T18:28:56.826749Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-01T18:29:18.330Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "asterisk",
          "vendor": "asterisk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 18.26.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 20.00.0, \u003c 20.15.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 21.00.0, \u003c 21.10.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 22.00.0, \u003c 22.5.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 20.7-cert6, \u003c 20.7-cert7"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in `asterisk/res/res_stir_shaken /verification.c` that can be exploited when an attacker can set an arbitrary Identity header, or STIR/SHAKEN is enabled, with verification set in the SIP profile associated with the endpoint to be attacked. This is fixed in versions 18.26.3, 20.7-cert6, 20.15.1, 21.10.1 and 22.5.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-01T17:57:29.933Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr"
        }
      ],
      "source": {
        "advisory": "GHSA-mrq5-74j5-f5cr",
        "discovery": "UNKNOWN"
      },
      "title": "Asterisk is Vulnerable to Remote DoS and possible RCE Attacks During Memory Allocation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-49832",
    "datePublished": "2025-08-01T17:57:29.933Z",
    "dateReserved": "2025-06-11T14:33:57.799Z",
    "dateUpdated": "2025-08-01T18:29:18.330Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-49832\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2025-08-01T18:15:52.667\",\"lastModified\":\"2025-08-25T17:42:27.407\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in `asterisk/res/res_stir_shaken /verification.c` that can be exploited when an attacker can set an arbitrary Identity header, or STIR/SHAKEN is enabled, with verification set in the SIP profile associated with the endpoint to be attacked. This is fixed in versions 18.26.3, 20.7-cert6, 20.15.1, 21.10.1 and 22.5.1.\"},{\"lang\":\"es\",\"value\":\"Asterisk es un kit de herramientas de telefon\u00eda y centralitas privadas de c\u00f3digo abierto. En las versiones hasta la 18.26.2 (incluida), entre las 20.00.0 y 20.15.0, 20.7-cert6, 21.00.0 y 22.00.0 a 22.5.0, existe una condici\u00f3n de denegaci\u00f3n de servicio (DoS) remota y un posible RCE en `asterisk/res/res_stir_shaken /verification.c` que puede explotarse cuando un atacante puede configurar un encabezado de identidad arbitrario, o si STIR/SHAKEN est\u00e1 habilitado, con la verificaci\u00f3n configurada en el perfil SIP asociado al endpoint atacado. Esto se ha corregido en las versiones 18.26.3, 20.7-cert6, 20.15.1, 21.10.1 y 22.5.1.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"18.26.3\",\"matchCriteriaId\":\"A99F7956-1812-47C7-9649-C889E5A296EB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"20.0.0\",\"versionEndExcluding\":\"20.15.1\",\"matchCriteriaId\":\"A3AD4D76-AF85-414E-8C6D-6C505D8D58D3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"21.0.0\",\"versionEndExcluding\":\"21.10.1\",\"matchCriteriaId\":\"D23AFE39-A2E8-45EE-9F0B-3A96731299FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"22.0.0\",\"versionEndExcluding\":\"22.5.1\",\"matchCriteriaId\":\"FFA121CE-5F37-4731-A1FA-B83F7E1AD845\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"18.9\",\"matchCriteriaId\":\"44460225-C50D-414A-A2E0-F8280E1C1E1D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:*\",\"matchCriteriaId\":\"79225576-AF7C-4099-9624-C53578A7417F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"29323E6E-12C9-46C7-B29C-25E0CD537A8E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"8E563972-78C0-40A0-83EA-6A3BA3D71946\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:*\",\"matchCriteriaId\":\"64209621-D458-432A-B0E3-C8D0B6698574\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:certified_asterisk:20.7:cert3:*:*:*:*:*:*\",\"matchCriteriaId\":\"B148158A-8354-41C2-A44C-2C0DAABAD217\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:certified_asterisk:20.7:cert4:*:*:*:*:*:*\",\"matchCriteriaId\":\"3D4D96E8-1F01-42B8-9181-67DEB12D9DD2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:certified_asterisk:20.7:cert5:*:*:*:*:*:*\",\"matchCriteriaId\":\"50D1B02A-F5F9-48EB-A396-412821F5D602\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:certified_asterisk:20.7:cert6:*:*:*:*:*:*\",\"matchCriteriaId\":\"4CBB2891-448F-4C4E-8A47-2283A8F71FE6\"}]}]}],\"references\":[{\"url\":\"https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-49832\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-08-01T18:28:56.826749Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-08-01T18:29:08.153Z\"}}], \"cna\": {\"title\": \"Asterisk is Vulnerable to Remote DoS and possible RCE Attacks During Memory Allocation\", \"source\": {\"advisory\": \"GHSA-mrq5-74j5-f5cr\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"asterisk\", \"product\": \"asterisk\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 18.26.3\"}, {\"status\": \"affected\", \"version\": \"\u003e= 20.00.0, \u003c 20.15.1\"}, {\"status\": \"affected\", \"version\": \"\u003e= 21.00.0, \u003c 21.10.1\"}, {\"status\": \"affected\", \"version\": \"\u003e= 22.00.0, \u003c 22.5.1\"}, {\"status\": \"affected\", \"version\": \"\u003e= 20.7-cert6, \u003c 20.7-cert7\"}]}], \"references\": [{\"url\": \"https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr\", \"name\": \"https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr\", \"tags\": [\"x_refsource_CONFIRM\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in `asterisk/res/res_stir_shaken /verification.c` that can be exploited when an attacker can set an arbitrary Identity header, or STIR/SHAKEN is enabled, with verification set in the SIP profile associated with the endpoint to be attacked. This is fixed in versions 18.26.3, 20.7-cert6, 20.15.1, 21.10.1 and 22.5.1.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476: NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2025-08-01T17:57:29.933Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-49832\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-08-01T18:29:18.330Z\", \"dateReserved\": \"2025-06-11T14:33:57.799Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2025-08-01T17:57:29.933Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.