Home/CVE/An issue was discovered in channels/chan_sip.c in Sangoma Asterisk 13.x before 13.29.2, 16.x before 16.6.2, and 17.x bef
CVE

CVE-2019-18790

An issue was discovered in channels/chan_sip.c in Sangoma Asterisk 13.x before 13.29.2, 16.x before 16.6.2, and 17.x bef

An issue was discovered in channels/chan_sip.c in Sangoma Asterisk 13.x before 13.29.2, 16.x before 16.6.2, and 17.x before 17.0.1, and Certified Asterisk 13.21 before cert5. A SIP request can be sent to Asterisk that can change a SIP peer's IP address. A REGISTER does not need to occur, and calls can be hijacked as a result. The only thing that needs to be known is the peer's name.

authentication details such as passwords do not need to be known. This vulnerability is only exploitable when the nat option is set to the default, or auto_force_rport.

MEDIUM · CVSS 6.5 EPSS 0.07372
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  • EPSS percentile: top 8% of all CVEs by exploitation likelihood
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Weakness Classification

CWE-862Missing Authorization
▤

Affected Products & Versions

5
digium asterisk>= 13.0.0 and < 13.29.2
digium asterisk>= 16.0.0 and < 16.6.2
digium asterisk>= 17.0.0 and < 17.0.1
digium certified asteriskall versions
debian linuxall versions
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Nov 2019 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://downloads.asterisk.org/pub/security/AST-2019-006.htmlPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2019/11/msg00038.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing ListThird Party Advisory
https://www.asterisk.org/downloads/security-advisoriesVendor Advisory
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