CVE-2018-18764 : Exploit Details and Defense Strategies

Cesanta Mongoose 6.13 is affected by a vulnerability where the MQTT packet-parsing functionality can be exploited to perform arbitrary memory reads. This vulnerability arises due to a heap-based buffer over-read in the parse_mqtt getu16 call, allowing an attacker to trigger memory beyond its boundaries, potentially leading to information disclosure and denial of service.

Understanding CVE-2018-18764

This CVE involves a specific vulnerability in Cesanta Mongoose 6.13 related to MQTT packet parsing.

What is CVE-2018-18764?

An exploitable arbitrary memory read vulnerability in Cesanta Mongoose 6.13
Heap-based buffer over-read in parse_mqtt getu16 call
Attacker can trigger memory beyond boundaries via crafted MQTT SUBSCRIBE packet

The Impact of CVE-2018-18764

Potential information disclosure and denial of service due to out-of-bounds memory read

Technical Details of CVE-2018-18764

This section provides technical insights into the vulnerability.

Vulnerability Description

Cesanta Mongoose 6.13 vulnerability in MQTT packet-parsing
Heap-based buffer over-read in parse_mqtt getu16 call

Affected Systems and Versions

Product: n/a
Vendor: n/a
Version: n/a

Exploitation Mechanism

Attacker sends a carefully crafted MQTT SUBSCRIBE packet
Triggers memory beyond boundaries

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2018-18764.

Immediate Steps to Take

Apply vendor patches or updates if available
Monitor network traffic for any suspicious MQTT packets
Implement network segmentation to limit attack surface

Long-Term Security Practices

Regularly update and patch software and firmware
Conduct security assessments and penetration testing
Educate users and administrators on secure MQTT packet handling

Patching and Updates

Check vendor's website for patches or security advisories
Apply recommended updates promptly to mitigate the vulnerability