What is the CVSS score of CVE-2017-11420?

CVE-2017-11420 has a CVSS 3.0 base score of 9.8 (Critical). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 17.7%.

Is there a public PoC exploit available for CVE-2017-11420?

Yes, a public proof-of-concept exploit is available for CVE-2017-11420. Prioritise patching immediately. EPSS: 17.7%.

Rt N56U Firmware CVE-2017-11420

CRITICAL

Buffer Overflow (CWE-119)

2017-07-18 cve@mitre.org

RCE Buffer Overflow Rt N56U Firmware Rt Ac66U Firmware Rt N66U Firmware Rt N16 Firmware Rt Ac68U Firmware Rt Ac53 Firmware Rt Ac5300 Firmware Rt Ac1900P Firmware Rt Ac68P Firmware Rt Ac88U Firmware Rt Ac66U B1 Firmware Rt Ac58U Firmware Rt Ac56U Firmware Rt Ac55U Firmware Rt Ac52U Firmware Rt Ac51U Firmware Rt N18U Firmware Rt Ac3200 Firmware Rt Ac3100 Firmware Rt Ac1200Gu Firmware Rt Ac1200G Firmware Rt Ac1200 Firmware Rt N12Hp Firmware Rt N12Hp B1 Firmware Rt N12D1 Firmware Rt N12 Firmware Rt N12 Pro Firmware Rt N300 Firmware Asuswrt Merlin Project

9.8

CVSS 3.0 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Jul 18, 2017 - 05:29 cve.org

CRITICAL 9.8

DescriptionCVE.org

Stack-based buffer overflow in ASUS_Discovery.c in networkmap in Asuswrt-Merlin firmware for ASUS devices and ASUS firmware for ASUS RT-AC5300, RT_AC1900P, RT-AC68U, RT-AC68P, RT-AC88U, RT-AC66U, RT-AC66U_B1, RT-AC58U, RT-AC56U, RT-AC55U, RT-AC52U, RT-AC51U, RT-N18U, RT-N66U, RT-N56U, RT-AC3200, RT-AC3100, RT_AC1200GU, RT_AC1200G, RT-AC1200, RT-AC53, RT-N12HP, RT-N12HP_B1, RT-N12D1, RT-N12+, RT_N12+_PRO, RT-N16, and RT-N300 devices allows remote attackers to execute arbitrary code via long device information that is mishandled during a strcat to a device list.

AnalysisAI

Stack-based buffer overflow in ASUS_Discovery.c in networkmap in Asuswrt-Merlin firmware for ASUS devices and ASUS firmware for ASUS RT-AC5300, RT_AC1900P, RT-AC68U, RT-AC68P, RT-AC88U, RT-AC66U,. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 17.7%.

Technical ContextAI

This vulnerability is classified as Buffer Overflow (CWE-119), which allows attackers to corrupt memory to execute arbitrary code or crash the application. Stack-based buffer overflow in ASUS_Discovery.c in networkmap in Asuswrt-Merlin firmware for ASUS devices and ASUS firmware for ASUS RT-AC5300, RT_AC1900P, RT-AC68U, RT-AC68P, RT-AC88U, RT-AC66U, RT-AC66U_B1, RT-AC58U, RT-AC56U, RT-AC55U, RT-AC52U, RT-AC51U, RT-N18U, RT-N66U, RT-N56U, RT-AC3200, RT-AC3100, RT_AC1200GU, RT_AC1200G, RT-AC1200, RT-AC53, RT-N12HP, RT-N12HP_B1, RT-N12D1, RT-N12+, RT_N12+_PRO, RT-N16, and RT-N300 devices allows remote attackers to execute arbitrary code via long device information that is mishandled during a strcat to a device list. Affected products include: Asuswrt-Merlin Project Rt-Ac5300 Firmware, Asuswrt-Merlin Project Rt Ac1900P Firmware, Asuswrt-Merlin Project Rt-Ac68U Firmware, Asuswrt-Merlin Project Rt-Ac68P Firmware, Asuswrt-Merlin Project Rt-Ac88U Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.