CVE-2019-12827

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-07-12 · updated 2026-06-17
Weakness: CWE-787

Description

Buffer overflow in res_pjsip_messaging in Digium Asterisk versions 13.21-cert3, 13.27.0, 15.7.2, 16.4.0 and earlier allows remote authenticated users to crash Asterisk by sending a specially crafted SIP MESSAGE message.

Affected products

Digium Asterisk: from 13.0.0 before 13.27.0; from 15.0.0 before 15.7.2; from 16.0.0 before 16.4.0 — fixed in 13.27.0, 15.7.2, 16.4.0
Digium Certified Asterisk: 13.21-cert1, 13.21-cert1-rc1, 13.21-cert1-rc2, 13.21-cert2, 13.21-cert3

How to fix

Upgrade to a fixed version: Digium Asterisk 13.27.0, 15.7.2, 16.4.0. Check the vendor advisory for mitigations.

References

http://downloads.digium.com/pub/security/AST-2019-002.html
https://issues.asterisk.org/jira/browse/ASTERISK-28447
http://downloads.digium.com/pub/security/AST-2019-002.html
https://issues.asterisk.org/jira/browse/ASTERISK-28447

Get alerted when CVE-2019-12827 or the next vulnerability affects your stack