Mitel MiVoice Connect Edge Gateway Remote Command Injection Vulnerability (CVE-2022-40765) Security Advisory
Executive & SecOps Summary
SECOPS ASSESSMENTEdge Gateway component of Mitel MiVoice Connect through 19.3 (version 22.22.6100.0 and prior)
An authenticated attacker with internal network access can execute arbitrary OS commands with system privileges due to insufficient validation of URL parameters
Apply the official security patches provided by Mitel immediately, or restrict network access to the Edge Gateway management interface
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Refer to Mitel Product Security Advisory 22-0007 and upgrade your MiVoice Connect and Edge Gateway to the latest secure release.
# Verify current system version and initiate update via administrative CLI
show system version
# Download and apply the official security patch from Mitel support
update system source ftp://support.mitel.com/patches/mivoice-connect-latest.bin2. Temporary Workaround & Hardening Configuration
If patching cannot be performed immediately, restrict access to the Edge Gateway management interface using network firewalls or access control lists (ACLs).
# Restrict access to the management port (e.g., TCP 443) using iptables
# Allow trusted administrator subnet
iptables -A INPUT -p tcp -s 192.168.10.0/24 --dport 443 -j ACCEPT
# Drop all other traffic to the management port
iptables -A INPUT -p tcp --dport 443 -j DROP3. Log Audit & IoC Verification Commands
Inspect the Edge Gateway web server logs for suspicious URL parameters containing shell metacharacters.
# Scan web access logs for common command injection payloads and encoded characters
grep -E '(\;|\||\`|\%3B|\%7C|\%60)' /var/log/nginx/access.log /var/log/httpd/access_log 2>/dev/nullStop Exposing VPN Ports to the Internet — Switch to Zero-Trust Access
Eliminate public-facing VPN concentrators and firewall management ports with identity-first Zero-Trust Network Access.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2022-40765) is a command injection flaw (CWE-77) residing in the Edge Gateway component of Mitel MiVoice Connect. The root cause is the application's failure to properly sanitize and validate user-supplied input within specific URL parameters. Consequently, when an attacker submits crafted HTTP requests, the input is passed directly to the underlying system shell, leading to unauthorized command execution.
2. Exploitation Mechanics & Attack Scenario
To exploit this vulnerability, an attacker must first gain access to the internal network and authenticate to the Edge Gateway management interface. The attacker then sends a malicious HTTP request containing shell metacharacters (such as ';', '&&', or '|') embedded within the vulnerable URL parameters. Because the gateway processes these parameters without adequate sanitization, the injected commands are executed on the host operating system under the context of the web service privileges.
3. Infrastructure & Business Impact
This vulnerability is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild. Successful exploitation allows attackers to gain full control over the Edge Gateway, potentially leading to eavesdropping on VoIP communications, session hijacking, and lateral movement into the internal corporate network, posing a severe threat to business operations and data confidentiality.
Official Vendor Advisories & References
A vulnerability in the Edge Gateway component of Mitel MiVoice Connect through 19.3 (22.22.6100.0) could allow an authenticated attacker with internal network access to conduct a command-injection attack, due to insufficient restriction of URL parameters.
Frequently Asked SecOps Questions (CVE-2022-40765)
FAQQ1. How critical is CVE-2022-40765 and is it actively exploited in the wild?
CVE-2022-40765 is rated CVSS 6.8 (MEDIUM) with a 30-day EPSS exploitation probability of 10.6%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2022-40765?
Primary impacted vendors include mitel across mivoice connect, edge gateway. Scope summary: Mitel MiVoice Connect through 19.3 (version 22.22.6100.0 and earlier)
Q3. What temporary mitigations or workarounds exist for CVE-2022-40765 before patching?
[Mitigation] Apply the official security patches provided by Mitel immediately, or restrict network access to the Edge Gateway management interface Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
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