Vulnerability Database

346,508

Total vulnerabilities in the database

CVE-2017-2315 — juniper / junos

Missing Release of Resource after Effective Lifetime

On Juniper Networks EX Series Ethernet Switches running affected Junos OS versions, a vulnerability in IPv6 processing has been discovered that may allow a specially crafted IPv6 Neighbor Discovery (ND) packet destined to an EX Series Ethernet Switch to cause a slow memory leak. A malicious network-based packet flood of these crafted IPv6 NDP packets may eventually lead to resource exhaustion and a denial of service. The affected Junos OS versions are: 12.3 prior to 12.3R12-S4, 12.3R13; 13.3 prior to 13.3R10; 14.1 prior to 14.1R8-S3, 14.1R9; 14.1X53 prior ro 14.1X53-D12, 14.1X53-D40; 14.1X55 prior to 14.1X55-D35; 14.2 prior to 14.2R6-S4, 14.2R7-S6, 14.2R8; 15.1 prior to 15.1R5; 16.1 before 16.1R3; 16.2 before 16.2R1-S3, 16.2R2. 17.1R1 and all subsequent releases have a resolution for this vulnerability.

  • Published: Apr 24, 2017
  • Updated: Nov 9, 2025
  • CVE: CVE-2017-2315
  • Severity: High
  • Exploit:

CVSS v2:

  • Severity: High
  • Score: 7.8
  • AV:N/AC:L/Au:N/C:N/I:N/A:C

CWEs:

Software From Fixed in
juniper / junos 14.1-r1 14.1-r1.x
juniper / junos 13.3-r7 13.3-r7.x
juniper / junos 14.1-r4 14.1-r4.x
juniper / junos 14.2-r1 14.2-r1.x
juniper / junos 13.3-r4 13.3-r4.x
juniper / junos 14.2-r2 14.2-r2.x
juniper / junos 14.1-r3 14.1-r3.x
juniper / junos 13.3-r5 13.3-r5.x
juniper / junos 12.3-r11 12.3-r11.x
juniper / junos 12.3-r2 12.3-r2.x
juniper / junos 13.3-r1 13.3-r1.x
juniper / junos 12.3-r9 12.3-r9.x
juniper / junos 13.3-r8 13.3-r8.x
juniper / junos 14.1x53-d10 14.1x53-d10.x
juniper / junos 16.1-r1 16.1-r1.x
juniper / junos 14.2-r3 14.2-r3.x
juniper / junos 14.1x53-d40 14.1x53-d40.x
juniper / junos 15.1-r3 15.1-r3.x
juniper / junos 12.3-r4 12.3-r4.x
juniper / junos 16.2-r2 16.2-r2.x
juniper / junos 12.3-r1 12.3-r1.x
juniper / junos 15.1-r4 15.1-r4.x
juniper / junos 12.3-r7 12.3-r7.x
juniper / junos 12.3-r6 12.3-r6.x
juniper / junos 12.3-r12 12.3-r12.x
juniper / junos 14.1-r9 14.1-r9.x
juniper / junos 15.1-r2 15.1-r2.x
juniper / junos 17.1-r1 17.1-r1.x
juniper / junos 14.2-r8 14.2-r8.x
juniper / junos 12.3-r13 12.3-r13.x
juniper / junos 12.3-r10 12.3-r10.x
juniper / junos 14.1-r7 14.1-r7.x
juniper / junos 14.1-r6 14.1-r6.x
juniper / junos 14.2-r7 14.2-r7.x
juniper / junos 14.2-r4 14.2-r4.x
juniper / junos 13.3-r9 13.3-r9.x
juniper / junos 13.3-r6 13.3-r6.x
juniper / junos 12.3-r5 12.3-r5.x
juniper / junos 12.3-r3 12.3-r3.x
juniper / junos 15.1-r1 15.1-r1.x
juniper / junos 13.3-r2 13.3-r2.x
juniper / junos 14.1-r2 14.1-r2.x
juniper / junos 14.1x55-d35 14.1x55-d35.x
juniper / junos 14.2-r5 14.2-r5.x
juniper / junos 13.3-r3 13.3-r3.x
juniper / junos 14.1-r5 14.1-r5.x
juniper / junos 12.3-r8 12.3-r8.x

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.