CVE-2019-18790

MEDIUM

Sangoma Asterisk <13.29.2,16.6.2,17.0.1 - Privilege Escalation

Title source: llm
STIX 2.1

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.

References (4)

Core 4
Core References
Patch, Vendor Advisory x_refsource_misc
http://downloads.asterisk.org/pub/security/AST-2019-006.html
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/11/msg00038.html
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html

Scores

CVSS v3 6.5
EPSS 0.0205
EPSS Percentile 78.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Details

CWE
CWE-862
Status published
Products (4)
debian/debian_linux 8.0
debian/debian_linux 9.0
digium/asterisk 13.0.0 - 13.29.2
digium/certified_asterisk 13.21.0 (6 CPE variants)
Published Nov 22, 2019
Tracked Since Feb 18, 2026