An issue was discovered in Asterisk Open Source through 13.27.0, 14.x and 15.x through 15.7.2, and 16.x through 16.4.0, and Certified Asterisk through 13.21-cert3. A pointer dereference in chan_sip while handling SDP negotiation allows an attacker to crash Asterisk when handling an SDP answer to an outgoing T.38 re-invite. To exploit this vulnerability an attacker must cause the chan_sip module to send a T.38 re-invite request to them. Upon receipt, the attacker must send an SDP answer containing both a T.38 UDPTL stream and another media stream containing only a codec (which is not permitted according to the chan_sip configuration).
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 3 products from digium, from digium, from debian organizations running these solutions should prioritize assessment and patching.
First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2019-07-12T20:15:11.127
2026-06-17T02:16:11.463
Modified
CVSSv3.1: 5.3 (MEDIUM)
AV:N/AC:M/Au:S/C:N/I:N/A:P
6.8
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.0.0 | Yes |
| Application | digium | certified_asterisk | 1.8.1.0 | Yes |
| Application | digium | certified_asterisk | 1.8.1.0 | Yes |
| Application | digium | certified_asterisk | 1.8.2.0 | Yes |
| Application | digium | certified_asterisk | 1.8.2.0 | Yes |
| Application | digium | certified_asterisk | 1.8.3.0 | Yes |
| Application | digium | certified_asterisk | 1.8.3.0 | Yes |
| Application | digium | certified_asterisk | 1.8.3.0 | Yes |
| Application | digium | certified_asterisk | 1.8.3.0 | Yes |
| Application | digium | certified_asterisk | 1.8.4.0 | Yes |
| Application | digium | certified_asterisk | 1.8.4.0 | Yes |
| Application | digium | certified_asterisk | 1.8.4.0 | Yes |
| Application | digium | certified_asterisk | 1.8.4.0 | Yes |
| Application | digium | certified_asterisk | 1.8.5.0 | Yes |
| Application | digium | certified_asterisk | 1.8.5.0 | Yes |
| Application | digium | certified_asterisk | 1.8.6.0 | Yes |
| Application | digium | certified_asterisk | 1.8.6.0 | Yes |
| Application | digium | certified_asterisk | 1.8.6.0 | Yes |
| Application | digium | certified_asterisk | 1.8.6.0 | Yes |
| Application | digium | certified_asterisk | 1.8.7.0 | Yes |
| Application | digium | certified_asterisk | 1.8.7.0 | Yes |
| Application | digium | certified_asterisk | 1.8.7.0 | Yes |
| Application | digium | certified_asterisk | 1.8.8.0 | Yes |
| Application | digium | certified_asterisk | 1.8.8.0 | Yes |
| Application | digium | certified_asterisk | 1.8.8.0 | Yes |
| Application | digium | certified_asterisk | 1.8.8.0 | Yes |
| Application | digium | certified_asterisk | 1.8.8.0 | Yes |
| Application | digium | certified_asterisk | 1.8.8.0 | Yes |
| Application | digium | certified_asterisk | 1.8.9.0 | Yes |
| Application | digium | certified_asterisk | 1.8.9.0 | Yes |
| Application | digium | certified_asterisk | 1.8.9.0 | Yes |
| Application | digium | certified_asterisk | 1.8.9.0 | Yes |
| Application | digium | certified_asterisk | 1.8.10.0 | Yes |
| Application | digium | certified_asterisk | 1.8.10.0 | Yes |
| Application | digium | certified_asterisk | 1.8.10.0 | Yes |
| Application | digium | certified_asterisk | 1.8.10.0 | Yes |
| Application | digium | certified_asterisk | 1.8.10.0 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11 | Yes |
| Application | digium | certified_asterisk | 1.8.11.0 | Yes |
| Application | digium | certified_asterisk | 1.8.11.0 | Yes |
| Application | digium | certified_asterisk | 1.8.11.0 | Yes |
| Application | digium | certified_asterisk | 1.8.11.0 | Yes |
| Application | digium | certified_asterisk | 1.8.12.0 | Yes |
| Application | digium | certified_asterisk | 1.8.12.0 | Yes |
| Application | digium | certified_asterisk | 1.8.12.0 | Yes |
| Application | digium | certified_asterisk | 1.8.12.0 | Yes |
| Application | digium | certified_asterisk | 1.8.13.0 | Yes |
| Application | digium | certified_asterisk | 1.8.13.0 | Yes |
| Application | digium | certified_asterisk | 1.8.13.0 | Yes |
| Application | digium | certified_asterisk | 1.8.14.0 | Yes |
| Application | digium | certified_asterisk | 1.8.14.0 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.15 | Yes |
| Application | digium | certified_asterisk | 1.8.28 | Yes |
| Application | digium | certified_asterisk | 1.8.28 | Yes |
| Application | digium | certified_asterisk | 1.8.28 | Yes |
| Application | digium | certified_asterisk | 1.8.28 | Yes |
| Application | digium | certified_asterisk | 1.8.28 | Yes |
| Application | digium | certified_asterisk | 1.8.28 | Yes |
| Application | digium | certified_asterisk | 1.8.28 | Yes |
| Application | digium | certified_asterisk | 1.8.28 | Yes |
| Application | digium | certified_asterisk | 1.8.28.0 | Yes |
| Application | digium | certified_asterisk | 11.0.0 | Yes |
| Application | digium | certified_asterisk | 11.0.0 | Yes |
| Application | digium | certified_asterisk | 11.0.0 | Yes |
| Application | digium | certified_asterisk | 11.1.0 | Yes |
| Application | digium | certified_asterisk | 11.1.0 | Yes |
| Application | digium | certified_asterisk | 11.1.0 | Yes |
| Application | digium | certified_asterisk | 11.1.0 | Yes |
| Application | digium | certified_asterisk | 11.2 | Yes |
| Application | digium | certified_asterisk | 11.2 | Yes |
| Application | digium | certified_asterisk | 11.2 | Yes |
| Application | digium | certified_asterisk | 11.2 | Yes |
| Application | digium | certified_asterisk | 11.3.0 | Yes |
| Application | digium | certified_asterisk | 11.3.0 | Yes |
| Application | digium | certified_asterisk | 11.3.0 | Yes |
| Application | digium | certified_asterisk | 11.4.0 | Yes |
| Application | digium | certified_asterisk | 11.4.0 | Yes |
| Application | digium | certified_asterisk | 11.4.0 | Yes |
| Application | digium | certified_asterisk | 11.4.0 | Yes |
| Application | digium | certified_asterisk | 11.5.0 | Yes |
| Application | digium | certified_asterisk | 11.5.0 | Yes |
| Application | digium | certified_asterisk | 11.5.0 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6 | Yes |
| Application | digium | certified_asterisk | 11.6.0 | Yes |
| Application | digium | certified_asterisk | 11.6.0 | Yes |
| Application | digium | certified_asterisk | 11.6.0 | Yes |
| Application | digium | certified_asterisk | 11.6.0 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1 | Yes |
| Application | digium | certified_asterisk | 13.1.0 | Yes |
| Application | digium | certified_asterisk | 13.1.0 | Yes |
| Application | digium | certified_asterisk | 13.1.0 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8 | Yes |
| Application | digium | certified_asterisk | 13.8.0 | Yes |
| Application | digium | certified_asterisk | 13.8.0 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13 | Yes |
| Application | digium | certified_asterisk | 13.13-cert2 | Yes |
| Application | digium | certified_asterisk | 13.18 | Yes |
| Application | digium | certified_asterisk | 13.18 | Yes |
| Application | digium | certified_asterisk | 13.18 | Yes |
| Application | digium | certified_asterisk | 13.18 | Yes |
| Application | digium | certified_asterisk | 13.18 | Yes |
| Application | digium | certified_asterisk | 13.18 | Yes |
| Application | digium | certified_asterisk | 13.18 | Yes |
| Application | digium | certified_asterisk | 13.21 | Yes |
| Application | digium | certified_asterisk | 13.21 | Yes |
| Application | digium | certified_asterisk | 13.21 | Yes |
| Application | digium | certified_asterisk | 13.21 | Yes |
| Application | digium | certified_asterisk | 13.21 | Yes |
| Application | digium | asterisk | < 13.27.1 | Yes |
| Application | digium | asterisk | < 15.7.3 | Yes |
| Application | digium | asterisk | < 16.4.1 | Yes |
| Operating System | debian | debian_linux | 8.0 | Yes |
| Operating System | debian | debian_linux | 9.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For digium's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.