CVE-2024-35512: n/a
hmq version 1. 5. 5 contains a vulnerability that allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted MQTT UNSUBSCRIBE packet with an illegal control character in the Topic field. This triggers a null pointer dereference, crashing the broker process immediately. The vulnerability does not affect confidentiality or integrity but impacts availability by terminating the hmq process unexpectedly. No patch or official remediation guidance is currently provided. The CVSS score is 5. 3, indicating a medium severity level.
AI Analysis
Technical Summary
CVE-2024-35512 describes a denial of service vulnerability in hmq v1.5.5 caused by improper validation of the Topic field in MQTT UNSUBSCRIBE packets. When a remote attacker sends a packet containing an illegal control character in this field, it leads to a null pointer dereference and crashes the hmq broker process. This vulnerability requires no privileges or user interaction and can be exploited remotely over the network. The impact is limited to availability disruption without affecting confidentiality or integrity.
Potential Impact
The vulnerability allows remote attackers to cause a denial of service by crashing the hmq broker process, resulting in service unavailability. There is no impact on data confidentiality or integrity. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider implementing network-level protections such as filtering or rate limiting MQTT UNSUBSCRIBE packets with suspicious or malformed Topic fields to reduce exposure.
CVE-2024-35512: n/a
Description
hmq version 1. 5. 5 contains a vulnerability that allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted MQTT UNSUBSCRIBE packet with an illegal control character in the Topic field. This triggers a null pointer dereference, crashing the broker process immediately. The vulnerability does not affect confidentiality or integrity but impacts availability by terminating the hmq process unexpectedly. No patch or official remediation guidance is currently provided. The CVSS score is 5. 3, indicating a medium severity level.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2024-35512 describes a denial of service vulnerability in hmq v1.5.5 caused by improper validation of the Topic field in MQTT UNSUBSCRIBE packets. When a remote attacker sends a packet containing an illegal control character in this field, it leads to a null pointer dereference and crashes the hmq broker process. This vulnerability requires no privileges or user interaction and can be exploited remotely over the network. The impact is limited to availability disruption without affecting confidentiality or integrity.
Potential Impact
The vulnerability allows remote attackers to cause a denial of service by crashing the hmq broker process, resulting in service unavailability. There is no impact on data confidentiality or integrity. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider implementing network-level protections such as filtering or rate limiting MQTT UNSUBSCRIBE packets with suspicious or malformed Topic fields to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2024-05-17T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e0fd6982d89c981f97e329
Added to database: 4/16/2026, 3:16:57 PM
Last enriched: 4/16/2026, 3:32:03 PM
Last updated: 4/16/2026, 8:11:54 PM
Views: 9
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.