{"api_version":"1","generated_at":"2026-07-15T12:50:33+00:00","cve":"CVE-2023-27601","urls":{"html":"https://cve.report/CVE-2023-27601","api":"https://cve.report/api/cve/CVE-2023-27601.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-27601","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-27601"},"summary":{"title":"CVE-2023-27601","description":"OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4, OpenSIPS crashes when a malformed SDP body is received and is processed by the `delete_sdp_line` function in the sipmsgops module. This issue can be reproduced by calling the function with an SDP body that does not terminate by a line feed (i.e. `\\n`). The vulnerability was found while performing black-box fuzzing against an OpenSIPS server running a configuration that made use of the functions `codec_delete_except_re` and `codec_delete_re`. The same issue was also discovered while performing coverage guided fuzzing on the function `codec_delete_except_re`. The crash happens because the function `delete_sdp_line` expects that an SDP line is terminated by a line feed (`\\n`): By abusing this vulnerability, an attacker is able to crash the server. It affects configurations containing functions that rely on the affected code, such as the function `codec_delete_except_re`. Due to the sanity check that is performed in the `del_lump` function, exploitation of this issue will generate an `abort` in the lumps processing function, resulting in a Denial of Service. This issue has been fixed in versions 3.1.7 and 3.2.4.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2023-03-15 22:15:00","updated_at":"2023-11-07 04:10:00"},"problem_types":["NVD-CWE-noinfo"],"metrics":[],"references":[{"url":"https://github.com/OpenSIPS/opensips/commit/8f87c7c03da55f9c79bd92e67fa2c94b2a7ce5cf","name":"https://github.com/OpenSIPS/opensips/commit/8f87c7c03da55f9c79bd92e67fa2c94b2a7ce5cf","refsource":"MISC","tags":[],"title":"[sipmsgops] fix codec_delete_XX() parsing · OpenSIPS/opensips@8f87c7c · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://opensips.org/docs/modules/3.3.x/sipmsgops.html","name":"https://opensips.org/docs/modules/3.3.x/sipmsgops.html","refsource":"MISC","tags":[],"title":"","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/OpenSIPS/opensips/security/advisories/GHSA-xj5x-g52f-548h","name":"https://github.com/OpenSIPS/opensips/security/advisories/GHSA-xj5x-g52f-548h","refsource":"MISC","tags":[],"title":"Vulnerability in the codec_delete_XX() functions · Advisory · OpenSIPS/opensips · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf","name":"https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf","refsource":"MISC","tags":[],"title":"","mime":"application/pdf","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-27601","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27601","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"27601","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"opensips","cpe5":"opensips","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2023-27601","ASSIGNER":"security-advisories@github.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4, OpenSIPS crashes when a malformed SDP body is received and is processed by the `delete_sdp_line` function in the sipmsgops module. This issue can be reproduced by calling the function with an SDP body that does not terminate by a line feed (i.e. `\\n`). The vulnerability was found while performing black-box fuzzing against an OpenSIPS server running a configuration that made use of the functions `codec_delete_except_re` and `codec_delete_re`. The same issue was also discovered while performing coverage guided fuzzing on the function `codec_delete_except_re`. The crash happens because the function `delete_sdp_line` expects that an SDP line is terminated by a line feed (`\\n`): By abusing this vulnerability, an attacker is able to crash the server. It affects configurations containing functions that rely on the affected code, such as the function `codec_delete_except_re`. Due to the sanity check that is performed in the `del_lump` function, exploitation of this issue will generate an `abort` in the lumps processing function, resulting in a Denial of Service. This issue has been fixed in versions 3.1.7 and 3.2.4."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-20: Improper Input Validation","cweId":"CWE-20"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"OpenSIPS","product":{"product_data":[{"product_name":"opensips","version":{"version_data":[{"version_affected":"=","version_value":"< 3.1.7"},{"version_affected":"=","version_value":">= 3.2.0, < 3.2.4"}]}}]}}]}},"references":{"reference_data":[{"url":"https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf","refsource":"MISC","name":"https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf"},{"url":"https://opensips.org/docs/modules/3.3.x/sipmsgops.html","refsource":"MISC","name":"https://opensips.org/docs/modules/3.3.x/sipmsgops.html"},{"url":"https://github.com/OpenSIPS/opensips/security/advisories/GHSA-xj5x-g52f-548h","refsource":"MISC","name":"https://github.com/OpenSIPS/opensips/security/advisories/GHSA-xj5x-g52f-548h"},{"url":"https://github.com/OpenSIPS/opensips/commit/8f87c7c03da55f9c79bd92e67fa2c94b2a7ce5cf","refsource":"MISC","name":"https://github.com/OpenSIPS/opensips/commit/8f87c7c03da55f9c79bd92e67fa2c94b2a7ce5cf"}]},"source":{"advisory":"GHSA-xj5x-g52f-548h","discovery":"UNKNOWN"},"impact":{"cvss":[{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}]}},"nvd":{"publishedDate":"2023-03-15 22:15:00","lastModifiedDate":"2023-11-07 04:10:00","problem_types":["NVD-CWE-noinfo"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:opensips:opensips:*:*:*:*:*:*:*:*","versionEndExcluding":"3.1.7","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:opensips:opensips:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.0","versionEndExcluding":"3.2.4","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}