What’s Vulnerable › Vulnerabilities

CVE-2017-16671

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.2% 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-119

Description

A Buffer Overflow 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. No size checking is done when setting the user field for Party B on a CDR. Thus, it is possible for someone to use an arbitrarily large string and write past the end of the user field storage buffer. NOTE: this is different from CVE-2017-7617, which was only about the Party A buffer.

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-2017-010.html
• http://www.securityfocus.com/bid/101760
• https://issues.asterisk.org/jira/browse/ASTERISK-27337
• https://security.gentoo.org/glsa/201811-11
• https://www.debian.org/security/2017/dsa-4076
• http://downloads.digium.com/pub/security/AST-2017-010.html
• http://www.securityfocus.com/bid/101760
• https://issues.asterisk.org/jira/browse/ASTERISK-27337
• https://security.gentoo.org/glsa/201811-11
• https://www.debian.org/security/2017/dsa-4076

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