CVE-2025-49832: Asterisk is Vulnerable to Remote DoS and possible RCE Attacks During Memory Allocation
Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in asterisk/res/resstirshaken /verification.c that can be exploited when an attacker can set an arbitrary Identity header, or STIR/SHAKEN is enabled, with verification set in the SIP profile associated with the endpoint to be attacked. This is fixed in versions 18.26.3, 20.7-cert6, 20.15.1, 21.10.1 and 22.5.1.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-49832?
CVE-2025-49832 has a high severity rating due to its potential for remote denial of service and remote code execution.
How do I fix CVE-2025-49832?
To mitigate CVE-2025-49832, upgrade Asterisk to a version higher than 22.5.0.
What versions are affected by CVE-2025-49832?
CVE-2025-49832 affects Asterisk versions up to and including 18.26.2, 20.00.0 through 20.15.0, 20.7-cert6, 21.00.0, and 22.00.0 through 22.5.0.
What type of vulnerability is CVE-2025-49832?
CVE-2025-49832 is a remote denial of service and possible remote code execution vulnerability.
Is there a workaround for CVE-2025-49832?
Currently, the recommended action is to upgrade to a secure version as no official workaround is provided for CVE-2025-49832.