HOME VULNERABILITIESCVE-2016-2316

MEDIUM

CVE-2016-2316

CWE-191Published: February 22, 2016· Updated: Jun 17, 2026

5.9

CVSS v3.1

Official Description

chan_sip in Asterisk Open Source 1.8.x, 11.x before 11.21.1, 12.x, and 13.x before 13.7.1 and Certified Asterisk 1.8.28, 11.6 before 11.6-cert12, and 13.1 before 13.1-cert3, when the timert1 sip.conf configuration is set to a value greater than 1245, allows remote attackers to cause a denial of service (file descriptor consumption) via vectors related to large retransmit timeout values.

Technical Analysis

CVE-2016-2316 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

Fedora1 product(s)

fedora

Source: NVD CPE · 124 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://downloads.asterisk.org/pub/security/AST-2016-002.html

PATCHhttp://downloads.asterisk.org/pub/security/AST-2016-002.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2016-February/177409.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2016-February/177422.html

ADVISORYhttp://www.securityfocus.com/bid/82651

ADVISORYhttp://www.securitytracker.com/id/1034930

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2016-February/177409.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2016-February/177422.html

ADVISORYhttp://www.securityfocus.com/bid/82651

ADVISORYhttp://www.securitytracker.com/id/1034930

All References (12)

→

http://downloads.asterisk.org/pub/security/AST-2016-002.htmlExploit · Patch · Vendor Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177409.htmlThird Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177422.htmlThird Party Advisory

→

http://www.debian.org/security/2016/dsa-3700

→

http://www.securityfocus.com/bid/82651Third Party Advisory · VDB Entry

→

http://www.securitytracker.com/id/1034930Third Party Advisory · VDB Entry

→

http://downloads.asterisk.org/pub/security/AST-2016-002.htmlExploit · Patch · Vendor Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177409.htmlThird Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177422.htmlThird Party Advisory

→

http://www.debian.org/security/2016/dsa-3700

→

http://www.securityfocus.com/bid/82651Third Party Advisory · VDB Entry

→

http://www.securitytracker.com/id/1034930Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2016-2316

CVSS Score5.9 / 10

SeverityMEDIUM

WeaknessCWE-191

CISA KEVNo

Affected2 vendor(s)

PublishedFeb 22, 2016

Related CVEs (CWE-191)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2016-2316 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.

← All Vulnerabilities·Search for CVE-2016-2316·NVD