CVE-2016-2316 — 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

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MEDIUM

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

Published Feb 22, 2016

5.9

MEDIUM

CVSS 3.0

EPSS 4.95%

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.

Affected products

Remediation

No remediation recorded yet.

Metrics

4.95% 0.04950

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.04950

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	4.95% (0.04950)	91.90th	v5 (v2026.06.15)
Jun 15, 2026	4.97% (0.04973)	91.05th	v5 (v2026.06.15)
Mar 17, 2025	0.86% (0.00863)	73.48th	v4 (v2025.03.14)
Dec 12, 2024	2.05% (0.02049)	89.46th	v3 (v2023.03.01)
Aug 4, 2023	2.05% (0.02049)	87.52th	v3 (v2023.03.01)
Mar 7, 2023	2.26% (0.02262)	87.84th	v3 (v2023.03.01)
Mar 6, 2023	1.32% (0.01319)	71.27th	v2 (v2022.01.01)
Feb 23, 2023	1.32% (0.01319)	71.23th	v2 (v2022.01.01)
Apr 1, 2022	1.32% (0.01319)	69.22th	v2 (v2022.01.01)
Feb 4, 2022	1.32% (0.01319)	44.98th	v2 (v2022.01.01)

Weaknesses (1)

CWE-191

References (6)

http://downloads.asterisk.org/pub/security/AST-2016-002.html
x_refsource_CONFIRMExploitPatchVendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177409.html
vendor-advisoryx_refsource_FEDORAThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177422.html
vendor-advisoryx_refsource_FEDORAThird Party Advisory
http://www.debian.org/security/2016/dsa-3700
vendor-advisoryx_refsource_DEBIAN
http://www.securityfocus.com/bid/82651
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1034930
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry

Link	Providers	Tags
http://downloads.asterisk.org/pub/security/AST-2016-002.html		x_refsource_CONFIRMExploitPatchVendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177409.html		vendor-advisoryx_refsource_FEDORAThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177422.html		vendor-advisoryx_refsource_FEDORAThird Party Advisory
http://www.debian.org/security/2016/dsa-3700		vendor-advisoryx_refsource_DEBIAN
http://www.securityfocus.com/bid/82651		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1034930		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Feb 22, 2016

Updated Aug 5, 2024

Reserved Feb 11, 2016

Link CVE-2016-2316

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2016-2316

Red Hat

Severity n/a

Public date n/a

Links CVE-2016-2316