CVE-2025-49832

Asterisk is Vulnerable to Remote DoS and possible RCE Attacks During Memory Allocation

Description

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/res_stir_shaken /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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.15%
Affected: asterisk asterisk
Published at:
Updated at:

References

Link Tags
https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr

Frequently Asked Questions

What is the severity of CVE-2025-49832?
CVE-2025-49832 has been scored as a medium severity vulnerability.
How to fix CVE-2025-49832?
To fix CVE-2025-49832, 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-2025-49832 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-49832 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-49832?
CVE-2025-49832 affects asterisk asterisk.
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