Vulnerability Database

391,289

Total vulnerabilities in the database

CVE-2016-2316 — fedoraproject / fedora

Integer Underflow (Wrap or Wraparound)

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
  • Updated: Sep 29, 2026
  • CVE: CVE-2016-2316
  • Severity: High
  • Exploit:
  • CISA KEV:

CVSS v2:

  • Severity: High
  • Score: 7.1
  • AV:N/AC:M/Au:N/C:N/I:N/A:C

CWEs:

Software Affected versions
fedoraproject / fedora = 22
fedoraproject / fedora = 23
digium / asterisk = 1.8.0
digium / asterisk = 1.8.0-beta1
digium / asterisk = 1.8.0-beta2
digium / asterisk = 1.8.0-beta3
digium / asterisk = 1.8.0-beta4
digium / asterisk = 1.8.0-beta5
digium / asterisk = 1.8.0-rc2
digium / asterisk = 1.8.0-rc3
digium / asterisk = 1.8.0-rc4
digium / asterisk = 1.8.0-rc5
digium / asterisk = 1.8.1
digium / asterisk = 1.8.1-rc1
digium / asterisk = 1.8.1.1
digium / asterisk = 1.8.1.2
digium / asterisk = 1.8.2
digium / asterisk = 1.8.2.1
digium / asterisk = 1.8.2.2
digium / asterisk = 1.8.2.3
digium / asterisk = 1.8.2.4
digium / asterisk = 1.8.3
digium / asterisk = 1.8.3-rc1
digium / asterisk = 1.8.3-rc2
digium / asterisk = 1.8.3-rc3
digium / asterisk = 1.8.3.1
digium / asterisk = 1.8.3.2
digium / asterisk = 1.8.3.3
digium / asterisk = 1.8.4
digium / asterisk = 1.8.4-rc1
digium / asterisk = 1.8.4-rc2
digium / asterisk = 1.8.4-rc3
digium / asterisk = 1.8.4.1
digium / asterisk = 1.8.4.2
digium / asterisk = 1.8.4.3
digium / asterisk = 1.8.4.4
digium / asterisk = 1.8.5
digium / asterisk = 1.8.5-rc1
digium / asterisk = 1.8.5.0
digium / asterisk = 1.8.6.0
digium / asterisk = 1.8.6.0-rc1
digium / asterisk = 1.8.6.0-rc2
digium / asterisk = 1.8.6.0-rc3
digium / asterisk = 1.8.7.0
digium / asterisk = 1.8.7.0-rc1
digium / asterisk = 1.8.7.0-rc2
digium / asterisk = 1.8.7.1
digium / asterisk = 1.8.8.0
digium / asterisk = 1.8.8.0-patch
digium / asterisk = 1.8.8.0-rc1
digium / asterisk = 1.8.8.0-rc2
digium / asterisk = 1.8.8.0-rc3
digium / asterisk = 1.8.8.0-rc4
digium / asterisk = 1.8.8.0-rc5
digium / asterisk = 1.8.8.1
digium / asterisk = 1.8.8.2
digium / asterisk = 1.8.9.0
digium / asterisk = 1.8.9.0-rc1
digium / asterisk = 1.8.9.0-rc2
digium / asterisk = 1.8.9.0-rc3
digium / asterisk = 1.8.9.1
digium / asterisk = 1.8.9.2
digium / asterisk = 1.8.9.3
digium / asterisk = 1.8.10.0
digium / asterisk = 1.8.10.0-rc1
digium / asterisk = 1.8.10.0-rc2
digium / asterisk = 1.8.10.0-rc3
digium / asterisk = 1.8.10.0-rc4
digium / asterisk = 1.8.10.1
digium / asterisk = 1.8.11.0
digium / asterisk = 1.8.11.0-patch
digium / asterisk = 1.8.11.0-rc2
digium / asterisk = 1.8.11.0-rc3
digium / asterisk = 1.8.11.1
digium / asterisk = 1.8.11.1-patch
digium / asterisk = 1.8.12
digium / asterisk = 1.8.12.0
digium / asterisk = 1.8.12.0-rc1
digium / asterisk = 1.8.12.0-rc2
digium / asterisk = 1.8.12.0-rc3
digium / asterisk = 1.8.12.1
digium / asterisk = 1.8.12.2
digium / asterisk = 1.8.13.0
digium / asterisk = 1.8.13.0-rc1
digium / asterisk = 1.8.13.0-rc2
digium / asterisk = 1.8.13.1
digium / asterisk = 1.8.14.0
digium / asterisk = 1.8.14.0-patch
digium / asterisk = 1.8.14.0-rc1
digium / asterisk = 1.8.14.0-rc2
digium / asterisk = 1.8.14.1
digium / asterisk = 1.8.14.1-patch
digium / asterisk = 1.8.15.0
digium / asterisk = 1.8.15.0-rc1
digium / asterisk = 1.8.15.1
digium / asterisk = 1.8.16.0
digium / asterisk = 1.8.16.0-rc1
digium / asterisk = 1.8.16.0-rc2
digium / asterisk = 1.8.17.0
digium / asterisk = 1.8.17.0-patch
digium / asterisk = 1.8.17.0-rc1
digium / asterisk = 1.8.17.0-rc2
digium / asterisk = 1.8.17.0-rc3
digium / asterisk = 1.8.18.0
digium / asterisk = 1.8.18.0-rc1
digium / asterisk = 1.8.18.1
digium / asterisk = 1.8.19.0
digium / asterisk = 1.8.19.0-rc1
digium / asterisk = 1.8.19.0-rc3
digium / asterisk = 1.8.19.1
digium / asterisk = 1.8.20.0
digium / asterisk = 1.8.20.0-patch
digium / asterisk = 1.8.20.0-rc1
digium / asterisk = 1.8.20.0-rc2
digium / asterisk = 1.8.20.1
digium / asterisk = 1.8.20.1-patch
digium / asterisk = 1.8.20.2
digium / asterisk = 1.8.20.2-patch
digium / asterisk = 1.8.21.0
digium / asterisk = 1.8.21.0-rc1
digium / asterisk = 1.8.21.0-rc2
digium / asterisk = 1.8.22.0
digium / asterisk = 1.8.22.0-rc1
digium / asterisk = 1.8.22.0-rc2
digium / asterisk = 1.8.23.0
digium / asterisk = 1.8.23.0-patch
digium / asterisk = 1.8.23.0-rc1
digium / asterisk = 1.8.23.0-rc2
digium / asterisk = 1.8.23.1
digium / asterisk = 1.8.24.0
digium / asterisk = 1.8.24.0-rc1
digium / asterisk = 1.8.24.0-rc2
digium / asterisk = 1.8.24.1
digium / asterisk = 1.8.25.0
digium / asterisk = 1.8.25.0-rc1
digium / asterisk = 1.8.25.0-rc2
digium / asterisk = 1.8.26.0
digium / asterisk = 1.8.26.0-rc1
digium / asterisk = 1.8.26.1
digium / asterisk = 1.8.27.0
digium / asterisk = 1.8.27.0-rc1
digium / asterisk = 1.8.27.0-rc2
digium / asterisk = 1.8.28.0
digium / asterisk = 1.8.28.0-rc1
digium / asterisk = 1.8.28.1
digium / asterisk = 1.8.28.2
digium / asterisk = 1.8.32.0
digium / asterisk = 11.0.0
digium / asterisk = 11.0.0-beta1
digium / asterisk = 11.0.0-beta2
digium / asterisk = 11.0.0-rc1
digium / asterisk = 11.0.0-rc2
digium / asterisk = 11.0.1
digium / asterisk = 11.0.2
digium / asterisk = 11.1.0
digium / asterisk = 11.1.0-rc1
digium / asterisk = 11.1.0-rc2
digium / asterisk = 11.1.0-rc3
digium / asterisk = 11.1.1
digium / asterisk = 11.1.2
digium / asterisk = 11.2.0-rc1
digium / asterisk = 11.4.0-rc4
digium / asterisk = 11.6.0
digium / asterisk = 11.6.0-rc1
digium / asterisk = 11.6.0-rc2
digium / asterisk = 11.7.0
digium / asterisk = 11.7.0-rc1
digium / asterisk = 11.7.0-rc2
digium / asterisk = 11.8.0
digium / asterisk = 11.8.0-rc1
digium / asterisk = 11.8.0-rc2
digium / asterisk = 11.8.0-rc3
digium / asterisk = 11.8.1
digium / asterisk = 11.9.0
digium / asterisk = 11.9.0-rc1
digium / asterisk = 11.9.0-rc2
digium / asterisk = 11.9.0-rc3
digium / asterisk = 11.10.0
digium / asterisk = 11.10.0-rc1
digium / asterisk = 11.10.1
digium / asterisk = 11.10.1-rc1
digium / asterisk = 11.11.0
digium / asterisk = 11.11.0-rc1
digium / asterisk = 11.12.0
digium / asterisk = 11.12.0-rc1
digium / asterisk = 11.13.0
digium / asterisk = 11.13.0-rc1
digium / asterisk = 11.14.0
digium / asterisk = 11.14.0-rc1
digium / asterisk = 11.14.0-rc2
digium / asterisk = 11.15.0
digium / asterisk = 11.15.0-rc1
digium / asterisk = 11.15.0-rc2
digium / asterisk = 11.16.0
digium / asterisk = 11.16.0-rc1
digium / asterisk = 11.17.0-rc1
digium / asterisk = 11.18.0
digium / asterisk = 11.18.0-rc1
digium / asterisk = 11.19.0-rc1
digium / asterisk = 11.20.0-rc1
digium / asterisk = 11.21.0
digium / asterisk = 11.21.0-rc1
digium / asterisk = 11.21.0-rc2
digium / asterisk = 11.21.0-rc3
digium / asterisk = 12.0.0
digium / asterisk = 12.1.0
digium / asterisk = 12.1.0-rc1
digium / asterisk = 12.1.0-rc2
digium / asterisk = 12.1.0-rc3
digium / asterisk = 12.1.1
digium / asterisk = 12.2.0
digium / asterisk = 12.2.0-rc1
digium / asterisk = 12.2.0-rc2
digium / asterisk = 12.2.0-rc3
digium / asterisk = 12.3.0
digium / asterisk = 12.3.0-rc1
digium / asterisk = 12.3.0-rc2
digium / asterisk = 12.3.1
digium / asterisk = 12.3.2
digium / asterisk = 12.4.0
digium / asterisk = 12.4.0-rc1
digium / asterisk = 12.5.0
digium / asterisk = 12.5.0-rc1
digium / asterisk = 12.6.0
digium / asterisk = 12.6.0-rc1
digium / asterisk = 12.7.0
digium / asterisk = 12.7.0-rc1
digium / asterisk = 12.7.0-rc2
digium / asterisk = 12.7.1
digium / asterisk = 12.8.0
digium / asterisk = 12.8.0-rc1
digium / asterisk = 12.8.0-rc2
digium / asterisk = 12.8.1
digium / asterisk = 12.8.2
digium / asterisk = 13.0.0
digium / asterisk = 13.0.1
digium / asterisk = 13.1.0
digium / asterisk = 13.1.0-rc1
digium / asterisk = 13.1.0-rc2
digium / asterisk = 13.2.0
digium / asterisk = 13.2.0-rc1
digium / asterisk = 13.3.0-rc1
digium / asterisk = 13.4.0
digium / asterisk = 13.4.0-rc1
digium / asterisk = 13.5.0
digium / asterisk = 13.5.0-rc1
digium / asterisk = 13.6.0-rc1
digium / asterisk = 13.7.0
digium / asterisk = 13.7.0-rc1
digium / asterisk = 13.7.0-rc2
digium / asterisk = 13.7.0-rc3
digium / certified_asterisk = 1.8.28
digium / certified_asterisk = 11.6-cert1
digium / certified_asterisk = 11.6-cert1_rc2
digium / certified_asterisk = 11.6-cert10
digium / certified_asterisk = 11.6-cert11
digium / certified_asterisk = 11.6-cert2
digium / certified_asterisk = 11.6-cert3
digium / certified_asterisk = 11.6-cert4
digium / certified_asterisk = 11.6-cert5
digium / certified_asterisk = 11.6-cert6
digium / certified_asterisk = 11.6-cert7
digium / certified_asterisk = 11.6-cert8
digium / certified_asterisk = 11.6-cert9
digium / certified_asterisk = 11.6.0
digium / certified_asterisk = 11.6.0-rc1
digium / certified_asterisk = 11.6.0-rc2
digium / certified_asterisk = 13.1
digium / certified_asterisk = 13.1-cert1
digium / certified_asterisk = 13.1-cert2
digium / certified_asterisk = 13.1.0
digium / certified_asterisk = 13.1.0-rc1
digium / certified_asterisk = 13.1.0-rc2

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.