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HighPublic exploit

OS command injection in Linksys E1000/E1200/E3200 apply.cgi ping_ip

IdentifiersCVE-2013-3307CWE-78· Improper Neutralization of Special…

CVE-2013-3307 is an OS command injection vulnerability in Linksys E1000 devices through 2.1.02, E1200 devices before 2.0.05, and E3200 devices through 1.0.04. The flaw is exposed via the apply.cgi endpoint on TCP port 52000, where the ping_ip parameter is insufficiently sanitized and accepts shell metacharacters. An attacker can supply crafted input to ping_ip so that the device executes unintended operating system commands in the underlying shell context.

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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 allows remote execution of arbitrary OS commands on affected Linksys routers. This can lead to full device compromise, malware deployment, botnet enrollment, configuration manipulation, persistence, traffic interception or redirection, and use of the router as a pivot for further network reconnaissance or attacks.

Mitigation

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

Restrict or block access to TCP port 52000 from untrusted networks, especially the Internet. Limit management-plane exposure with firewall rules or ACLs, place affected devices behind trusted administration boundaries, disable unnecessary remote administration features if present, and monitor for exploitation attempts against apply.cgi with shell metacharacters in ping_ip. Given the age of the affected products and observed botnet exploitation, retiring exposed legacy devices is the strongest mitigation where patching is not feasible.

Remediation

Patch, then assume compromise.

Upgrade affected devices to fixed firmware versions. Based on the provided information, affected versions are Linksys E1000 through 2.1.02, E1200 before 2.0.05, and E3200 through 1.0.04; therefore remediation is to move to vendor firmware newer than those affected releases, including at minimum E1200 2.0.05 or later and corresponding fixed releases for E1000 and E3200. If vendor-supported updates are unavailable because the hardware is obsolete, replace the device.
PUBLIC EXPLOITS

Exploits

No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.

VALID 0 / 1 TOTALView more in app

All candidate exploits were filtered out by Mallory's validation.

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Threat actor evidence

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Associated malware4

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Detection signatures

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Vendor-by-vendor mapping

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