What’s Vulnerable › Vulnerabilities

CVE-2017-16672

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-11-09 · updated 2026-06-17
• Weakness: CWE-772

Description

An issue was discovered in Asterisk Open Source 13 before 13.18.1, 14 before 14.7.1, and 15 before 15.1.1 and Certified Asterisk 13.13 before 13.13-cert7. A memory leak occurs when an Asterisk pjsip session object is created and that call gets rejected before the session itself is fully established. When this happens the session object never gets destroyed. Eventually Asterisk can run out of memory and crash.

Affected products

• Digium Asterisk: from 13.0.0 before 13.18.1; from 14.0.0 before 14.7.1; from 15.0.0 before 15.1.1 — fixed in 13.18.1, 14.7.1, 15.1.1
• Digium Certified Asterisk: 13.13.0, 13.13.0-cert1, 13.13.0-cert1_rc1, 13.13.0-cert1_rc2, 13.13.0-cert1_rc3, 13.13.0-cert1_rc4 (+5)

How to fix

Upgrade to a fixed version: Digium Asterisk 13.18.1, 14.7.1, 15.1.1. Check the vendor advisory for mitigations.

References

• http://downloads.digium.com/pub/security/AST-2017-011.html
• http://www.securityfocus.com/bid/101765
• https://issues.asterisk.org/jira/browse/ASTERISK-27345
• https://security.gentoo.org/glsa/201811-11
• https://www.debian.org/security/2017/dsa-4076
• http://downloads.digium.com/pub/security/AST-2017-011.html
• http://www.securityfocus.com/bid/101765
• https://issues.asterisk.org/jira/browse/ASTERISK-27345
• https://security.gentoo.org/glsa/201811-11
• https://www.debian.org/security/2017/dsa-4076

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