{"id":"CVE-2025-49832","state":"PUBLISHED","title":"Asterisk is Vulnerable to Remote DoS and possible RCE Attacks During Memory Allocation","description":"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.","publishedAt":"2025-08-01T17:57:29.933Z","updatedAt":"2025-08-01T18:29:18.330Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["asterisk asterisk"],"affected":[{"vendor":"asterisk","product":"asterisk","versions":[{"version":"< 18.26.3","status":"affected"},{"version":">= 20.00.0, < 20.15.1","status":"affected"},{"version":">= 21.00.0, < 21.10.1","status":"affected"},{"version":">= 22.00.0, < 22.5.1","status":"affected"},{"version":">= 20.7-cert6, < 20.7-cert7","status":"affected"}]}],"references":["https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:09:23.771Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/49xxx/CVE-2025-49832.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-49832","state":"PUBLISHED","datePublished":"2025-08-01T17:57:29.933Z","dateUpdated":"2025-08-01T18:29:18.330Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-06-11T14:33:57.799Z"},"containers":{"cna":{"title":"Asterisk is Vulnerable to Remote DoS and possible RCE Attacks During Memory Allocation","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."}],"affected":[{"vendor":"asterisk","product":"asterisk","versions":[{"version":"< 18.26.3","status":"affected"},{"version":">= 20.00.0, < 20.15.1","status":"affected"},{"version":">= 21.00.0, < 21.10.1","status":"affected"},{"version":">= 22.00.0, < 22.5.1","status":"affected"},{"version":">= 20.7-cert6, < 20.7-cert7","status":"affected"}]}],"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"]}],"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","lang":"en","description":"CWE-476: NULL Pointer Dereference","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-08-01T17:57:29.933Z"},"source":{"advisory":"GHSA-mrq5-74j5-f5cr","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-08-01T18:28:56.826749Z","id":"CVE-2025-49832","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-08-01T18:29:18.330Z"}}]}}}