Is CVE-2017-16672 in the CISA KEV catalog?

No. CVE-2017-16672 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-16672?

CVE-2017-16672 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2017-16672?

CVE-2017-16672 has an EPSS score of 4.68% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-16672?

Upgrade asterisk on debian 11 to 1:13.18.1~dfsg-1 or later.

CVE & CISA-KEV Catalog

CVE-2017-16672

MEDIUMEPSS 91th pctl

5.9

CVSS v3

NVD

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.

CWE-772

How to fix

Remediation Available

asteriskDebian

Fixed in:1:13.18.1~dfsg-1CVE-2017-16672

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

4.68%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory1

securityfocus.com

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.