How severe is CVE-2017-16672?

CVE-2017-16672 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-16672 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-16672?

CVE-2017-16672 primarily affects Digium Asterisk. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-16672?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-16672 published?

CVE-2017-16672 was published on 2017-11-09 and last updated on 2026-06-17.

CVE-2017-16672

CVE-2017-16672 is a medium-severity vulnerability in Digium Asterisk with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-772.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-772
Affected product: Digium Asterisk
Published: 2017-11-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2017-16672?: 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.
How severe is CVE-2017-16672?: CVE-2017-16672 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-16672 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-16672?: CVE-2017-16672 primarily affects Digium Asterisk. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-16672?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-16672 published?: CVE-2017-16672 was published on 2017-11-09 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:cert1:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:cert1_rc1:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:cert1_rc2:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:cert1_rc3:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:cert1_rc4:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:cert2:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:cert3:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:cert4:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:cert5:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.13.0:cert6:*:*:*:*:*:*

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