An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older. A select set of SIP messages create a dialog in Asterisk. Those SIP messages must contain a contact header. For those messages, if the header was not present and the PJSIP channel driver was used, Asterisk would crash. The severity of this vulnerability is somewhat mitigated if authentication is enabled. If authentication is enabled, a user would have to first be authorized before reaching the crash point.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* | 13.0.0 – 13.18.4; 14.0.0 – 14.7.4; 15.0.0 – 15.1.4 | Vulnerable | Digium |
| cpe:2.3:a:digium:certified_asterisk:13.1.0:*:*:*:*:*:*:* | 13.1.0 | Vulnerable | Digium |
| cpe:2.3:a:digium:certified_asterisk:13.1.0:rc1:*:*:*:*:*:* | 13.1.0 rc1 | Vulnerable | Digium |
| cpe:2.3:a:digium:certified_asterisk:13.1.0:rc2:*:*:*:*:*:* | 13.1.0 rc2 | Vulnerable | Digium |
| cpe:2.3:a:digium:certified_asterisk:13.8:cert1:*:*:*:*:*:* | 13.8 cert1 | Vulnerable | Digium |
- cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* Versions 13.0.0 – 13.18.4; 14.0.0 – 14.7.4; 15.0.0 – 15.1.4 Vulnerable ·Digium
- cpe:2.3:a:digium:certified_asterisk:13.1.0:*:*:*:*:*:*:* Versions 13.1.0 Vulnerable ·Digium
- cpe:2.3:a:digium:certified_asterisk:13.1.0:rc1:*:*:*:*:*:* Versions 13.1.0 rc1 Vulnerable ·Digium
- cpe:2.3:a:digium:certified_asterisk:13.1.0:rc2:*:*:*:*:*:* Versions 13.1.0 rc2 Vulnerable ·Digium
- cpe:2.3:a:digium:certified_asterisk:13.8:cert1:*:*:*:*:*:* Versions 13.8 cert1 Vulnerable ·Digium
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2017-17850
- 2026-10-03 Alias added: GHSA-cx4v-84p4-4vh6
References
More Digium Asterisk vulnerabilities
- TI-2006-05256 Integer overflow in the get_input function in the Skinny channel driver (chan_skinny.c)… CVSS 2.0HIGH 7.5
- TI-2017-12542 An issue was discovered in chan_skinny.c in Asterisk Open Source 13.18.2 and older… CVSS 3.0HIGH 7.5
- TI-2023-27195 Asterisk susceptible to Denial of Service via DTLS Hello packets during call initiation CVSS 3.1HIGH 7.5
- TI-2019-13459 An issue was discovered in manager.c in Sangoma Asterisk through 13.x, 16.x, 17.x and… CVSS 3.1HIGH 8.8
- TI-2018-05283 A Buffer Overflow issue was discovered in Asterisk through 13.19.1, 14.x through 14.7.5… CVSS 3.0HIGH 7.5
- TI-2018-12332 There is a stack consumption vulnerability in the res_http_websocket.so module of… CVSS 3.0HIGH 7.5
Sources
- CVE-2017-17850 · CVE Program
- CVE-2017-17850 · NVD
- FIRST EPSS
- GHSA-cx4v-84p4-4vh6 · GitHub Advisory Database · CC BY 4.0
- CVE-2017-17850 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences