CVE-2013-4687

flowd in Juniper Junos 10.4 before 10.4S14, 11.2 and 11.4 before 11.4R6-S2, and 12.1 before 12.1R6 on SRX devices, when certain Application Layer Gateways (ALGs) are enabled, allows remote attackers to cause a denial of service (daemon crash) via crafted TCP packets, aka PRs 727980, 806269, and 835593.

Published: 2013-07-11 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-4687 is rated Moderate Risk (59.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.37%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-4687

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 2.85% 2.37% -0.48%
2 2025-03-29 2.37% 2.85% +0.48%
3 2025-03-17 — 2.37% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-4687

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2013-4687

Affected software / configurations for CVE-2013-4687

Vendor Product Version Raw CPE
juniper junos 10.4 cpe:2.3:o:juniper:junos:10.4:*:*:*:*:*:*:*
juniper junos 11.2 cpe:2.3:o:juniper:junos:11.2:*:*:*:*:*:*:*
juniper junos 11.4 cpe:2.3:o:juniper:junos:11.4:*:*:*:*:*:*:*
juniper junos 12.1 cpe:2.3:o:juniper:junos:12.1:*:*:*:*:*:*:*
juniper srx100 — cpe:2.3:h:juniper:srx100:-:*:*:*:*:*:*:*
juniper srx110 — cpe:2.3:h:juniper:srx110:-:*:*:*:*:*:*:*
juniper srx1400 — cpe:2.3:h:juniper:srx1400:-:*:*:*:*:*:*:*
juniper srx210 — cpe:2.3:h:juniper:srx210:-:*:*:*:*:*:*:*
juniper srx220 — cpe:2.3:h:juniper:srx220:-:*:*:*:*:*:*:*
juniper srx240 — cpe:2.3:h:juniper:srx240:-:*:*:*:*:*:*:*
juniper srx3400 — cpe:2.3:h:juniper:srx3400:-:*:*:*:*:*:*:*
juniper srx3600 — cpe:2.3:h:juniper:srx3600:-:*:*:*:*:*:*:*
juniper srx550 — cpe:2.3:h:juniper:srx550:-:*:*:*:*:*:*:*
juniper srx5600 — cpe:2.3:h:juniper:srx5600:-:*:*:*:*:*:*:*
juniper srx5800 — cpe:2.3:h:juniper:srx5800:-:*:*:*:*:*:*:*
juniper srx650 — cpe:2.3:h:juniper:srx650:-:*:*:*:*:*:*:*

References for CVE-2013-4687

cvelogic Threat Intelligence