HOMEVULNERABILITIESCVE-2017-16672
MEDIUM

CVE-2017-16672

CWE-772Published: November 9, 2017· Updated: Jun 17, 2026

5.9
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2017-16672 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.9.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
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

Affected Vendors & Products

digium2 product(s)
asteriskcertified asterisk
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://downloads.digium.com/pub/security/AST-2017-011.html
ADVISORYhttp://www.securityfocus.com/bid/101765
ADVISORYhttps://issues.asterisk.org/jira/browse/ASTERISK-27345
ADVISORYhttp://downloads.digium.com/pub/security/AST-2017-011.html
ADVISORYhttp://www.securityfocus.com/bid/101765
ADVISORYhttps://issues.asterisk.org/jira/browse/ASTERISK-27345

All References (10)

→
http://downloads.digium.com/pub/security/AST-2017-011.htmlVendor Advisory
→
http://www.securityfocus.com/bid/101765Third Party Advisory · VDB Entry
→
https://issues.asterisk.org/jira/browse/ASTERISK-27345Vendor Advisory
→
https://security.gentoo.org/glsa/201811-11
→
https://www.debian.org/security/2017/dsa-4076
→
http://downloads.digium.com/pub/security/AST-2017-011.htmlVendor Advisory
→
http://www.securityfocus.com/bid/101765Third Party Advisory · VDB Entry
→
https://issues.asterisk.org/jira/browse/ASTERISK-27345Vendor Advisory
→
https://security.gentoo.org/glsa/201811-11
→
https://www.debian.org/security/2017/dsa-4076

Quick Facts

CVE IDCVE-2017-16672
CVSS Score5.9 / 10
SeverityMEDIUM
WeaknessCWE-772
CISA KEVNo
Affected1 vendor(s)
PublishedNov 9, 2017

Related CVEs (CWE-772)

CVE-2020-12134
9.8
CVE-2017-11641
9.8
CVE-2017-14138
9.8
CVE-2017-15032
9.8
CVE-2017-12663
8.8
CVE-2017-11170
8.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-16672 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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