CVE-2025-49832CWE-476

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

Medium · published August 1, 2025

CVSS v3.1
6.5
EPSS
0%
Percentile
41.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00494 · 41.5th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2025-08-01T17:57Z
EPSS history
Timeline
  • 01 AUG 17:57Z
    Asterisk is Vulnerable to Remote DoS and possible RCE Attacks During Memory Allocation
    cvelistv5