PT-2018-14636 · Cesanta · Mongoose

Published 2018-10-28 · Updated 2018-12-07 · CVE-2018-18764

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cesanta Mongoose version 6.13

Description An arbitrary memory read issue exists in the MQTT packet-parsing functionality. It is a heap-based buffer over-read in a parse mqtt getu16 call. A specially crafted MQTT SUBSCRIBE packet can cause an out-of-bounds memory read, potentially resulting in information disclosure and denial of service. An attacker needs to send a specially crafted MQTT packet over the network to trigger this issue.

Recommendations For Cesanta Mongoose version 6.13, consider restricting access to the MQTT packet-parsing functionality until a patch is available. As a temporary workaround, avoid using the parse mqtt getu16 call in the affected API endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2018-18764

Affected Products

Mongoose

References · 9

• 🔥 https://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/Cesanta%20Mongoose%20MQTT%20getu16%20heap%20buffer%20overflow2.md · Exploit
• 🔥 https://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/Cesanta%20Mongoose%20MQTT%20getu16%20heap%20buffer%20overflow1.md · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-18764 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-18764 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-18764 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2018-18764 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-18764 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-18764 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-18764 · Security Note