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Vulnerability record · CVE-2017-16671 · published 9 November 2017

CVE-2017-16671: Digium asterisk memory buffer overflow vulnerability

Digium · Asterisk

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.

8.8 CVSS 3.0 High EPSS 3.3% · top 11.8% CWE-119 · Memory buffer overflow
8.8CVSS 3.0 base score, v2 6.5
3.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://downloads.digium.com/pub/security/AST-2017-010.html Vendor Advisory
http://www.securityfocus.com/bid/101760 Third Party AdvisoryVDB Entry
https://issues.asterisk.org/jira/browse/ASTERISK-27337 Issue TrackingVendor Advisory
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 Vendor Advisory
http://www.securityfocus.com/bid/101760 Third Party AdvisoryVDB Entry
https://issues.asterisk.org/jira/browse/ASTERISK-27337 Issue TrackingVendor Advisory
https://security.gentoo.org/glsa/201811-11
https://www.debian.org/security/2017/dsa-4076

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-16671), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.