CriticalPublic exploit

Unauthenticated command execution in DCN DCBI-Netlog-LAB

IdentifiersCVE-2023-26802CWE-78

CVE-2023-26802 affects DCN (Digital China Networks) DCBI-Netlog-LAB v1.0. Insufficient sanitization of user-controlled input in a network configuration CGI component allows a crafted request to bypass authentication and execute arbitrary commands remotely. The IZ1H9 Mirai variant exploited this vulnerability in attacks observed on April 10, 2023.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation permits authentication bypass and arbitrary command execution on the affected device. Observed IZ1H9 campaigns used this vulnerability to deploy botnet malware. Compromised devices could be controlled by attackers and used for distributed denial-of-service attacks; campaign payloads also deleted logs and altered firewall rules to hinder remote recovery.

Mitigation

If you can’t patch tonight, do this now.

Until a patch is applied, restrict access to the affected management interface so that the vulnerable CGI endpoint is not reachable from untrusted networks, especially the public internet. Place the interface behind VPN or administrative network segmentation, enforce allowlisting for trusted management hosts, and monitor for suspicious requests targeting the affected CGI component. Where feasible, disable external access to the product’s web administration surface and inspect devices for signs of post-exploitation compromise.

Remediation

Patch, then assume compromise.

General router remediation guidance is to upgrade to the latest vendor firmware and discontinue end-of-life products. A CVE-2023-26802-specific fixed firmware version is not identified in the available information.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

DcnglobalDcbi-Netlog-Lab Firmwareoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

5 SOURCESView more in app

palo alto networks unit 42 blogNews

May 25, 2023

Old Wine in the New Bottle: Mirai Variant Targets Multiple IoT Devices

A remote code execution vulnerability in the DCN DCBI-Netlog-LAB nsg_masq.cgi component caused by insufficient input sanitization, exploited by the IZ1H9 Mirai variant to compromise devices.

fortiguard otherNews

Feb 1, 2023

Router Malware Attack | Outbreak Alert | FortiGuard Labs

Listed as a router vulnerability covered by the report, but no vulnerability-specific details are provided.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware3

Malware families riding this exploit, with evidence and IOCs.

Detection signatures1

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity3

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2023-26802

NVD

nvd.nist.gov/vuln/detail/CVE-2023-26802

MITRE CWE · CWE-78

cwe.mitre.org

Third Party Advisory

github.com/winmt/my-vuls/tree/main/DCN%20DCBI-Netlog-LAB

Unauthenticated command execution in DCN DCBI-Netlog-LAB

IdentifiersCVE-2023-26802CWE-78