No exploitation reportedFix available

CVE-2017-16671

Q: Is CVE-2017-16671 actively exploited?

Active exploitation of CVE-2017-16671 has not been confirmed. Its EPSS score was 4.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2017-16671?

CVE-2017-16671 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2017-11-09
Fixed in15.1.1 · 14.7.1 · 13.18.1
WeaknessCWE-119

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2017-11-0900:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-16671?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-16671?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Digium asterisk

Branch	Affected	Fixed in	Source
15.x	≥ 15.0.0, < 15.1.1	15.1.1	NVD
14.x	≥ 14.0.0, < 14.7.1	14.7.1	NVD
13.x	≥ 13.0.0, < 13.18.1	13.18.1	NVD

Digium certified asterisk

Branch	Affected	Fixed in	Source
13.13	= 13.13.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Digium asterisk to 15.1.1 · 14.7.1 · 13.18.1

Advisories and patches

downloads.digium.comVendor Advisory
issues.asterisk.orgVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.08.8read 2026-10-23
NVDCVSS 2.06.5read 2026-10-23
NVDweakness (CWE)CWE-119read 2026-10-23
FIRST EPSSEPSS score4.2 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2017-11-09
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-16671?

Is CVE-2017-16671 actively exploited?

Active exploitation of CVE-2017-16671 has not been confirmed. Its EPSS score was 4.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-16671?

CVE-2017-16671 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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