CVE-2019-18790
This vulnerability is only exploitable when the nat option is set to the default, or auto_force_rport.
Does this matter?
Lower severity and a low EPSS score (2.05%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- EPSS
- 2.05% probability · 80th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-862
- Affected
- digium/asterisk · digium/certified asterisk · debian/debian linux
- Source
- cve@mitre.org
References
- http://downloads.asterisk.org/pub/security/AST-2019-006.htmlPatch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/11/msg00038.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing List, Third Party Advisory
- https://www.asterisk.org/downloads/security-advisoriesVendor Advisory
- http://downloads.asterisk.org/pub/security/AST-2019-006.htmlPatch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/11/msg00038.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing List, Third Party Advisory
- https://www.asterisk.org/downloads/security-advisoriesVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.