CVE-2019-18790

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 7.42% Top 10%
Vendor Advisory asterisk.org Vendor Advisory asterisk.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.asterisk.org/downloads/security-advisories vendor advisory
http://downloads.asterisk.org/pub/security/AST-2019-006.html patch vendor advisory
https://lists.debian.org/debian-lts-announce/2019/11/msg00038.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2019-18790?
CVE-2019-18790 has been scored as a medium severity vulnerability.
How to fix CVE-2019-18790?
To fix CVE-2019-18790, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-18790 being actively exploited in the wild?
It is possible that CVE-2019-18790 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~7% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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