github - ghsa-86xp-hg9p-72mv

GHSA-86XP-HG9P-72MV

Vulnerability from github – Published: 2025-07-16 21:30 – Updated: 2025-07-16 21:30

Details

A remote code execution vulnerability exists in multiple Netcore and Netis routers models with firmware released prior to August 2014 due to the presence of an undocumented backdoor listener on UDP port 53413. Exact version boundaries remain undocumented. An unauthenticated remote attacker can send specially crafted UDP packets to execute arbitrary commands on the affected device. This backdoor uses a hardcoded authentication mechanism and accepts shell commands post-authentication. Some device models include a non-standard implementation of the echo command, which may affect exploitability.

Severity ?

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2025-34117"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-16T21:15:26Z",
    "severity": "CRITICAL"
  },
  "details": "A remote code execution vulnerability exists in multiple Netcore and Netis routers models with firmware released prior to August 2014 due to the presence of an undocumented backdoor listener on UDP port 53413. Exact version boundaries remain undocumented. An unauthenticated remote attacker can send specially crafted UDP packets to execute arbitrary commands on the affected device. This backdoor uses a hardcoded authentication mechanism and accepts shell commands post-authentication. Some device models include a non-standard implementation of the `echo` command, which may affect exploitability.",
  "id": "GHSA-86xp-hg9p-72mv",
  "modified": "2025-07-16T21:30:36Z",
  "published": "2025-07-16T21:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-34117"
    },
    {
      "type": "WEB",
      "url": "https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/misc/netcore_udp_53413_backdoor.rb"
    },
    {
      "type": "WEB",
      "url": "https://vulners.com/metasploit/MSF:EXPLOIT-LINUX-MISC-NETCORE_UDP_53413_BACKDOOR-"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20140828114943/http://blog.trendmicro.com/trendlabs-security-intelligence/netis-routers-leave-wide-open-backdoor"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/43387"
    },
    {
      "type": "WEB",
      "url": "https://www.seebug.org/vuldb/ssvid-90227"
    },
    {
      "type": "WEB",
      "url": "https://www.shadowserver.org/what-we-do/network-reporting/netcore-netis-router-vulnerability-scan-report"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/netcore-netis-routers-backdoor-rce"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2025-34117 (GCVE-0-2025-34117)

Vulnerability from cvelistv5 – Published: 2025-07-16 21:02 – Updated: 2025-11-19 14:36

Summary

Severity ?

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CWE

CWE-912 - Hidden Functionality
CWE-306 - Missing Authentication for Critical Function
CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

VulnCheck

References

URL

Tags

	https://web.archive.org/web/20140828114943/http:/…	third-party-advisorytechnical-description
	https://www.seebug.org/vuldb/ssvid-90227	third-party-advisorytechnical-description
	https://raw.githubusercontent.com/rapid7/metasplo…	exploit
	https://www.shadowserver.org/what-we-do/network-r…	third-party-advisory
	https://vulners.com/metasploit/MSF:EXPLOIT-LINUX-…	third-party-advisoryexploit
	https://www.vulncheck.com/advisories/netcore-neti…	third-party-advisory
	https://www.exploit-db.com/exploits/43387	exploit

Impacted products

Vendor

Product

Version

Netcore Technology

Router firmware

Affected: Prior to August 2014

Netis

Router firmware

Affected: Prior to August 2014

Credits

Trend Micro TrendLabs

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-86XP-HG9P-72MV

CVE-2025-34117 (GCVE-0-2025-34117)

Tags

Sightings

Nomenclature