Cesanta Mongoose 6.13 MQTT Parser mg_mqtt_next_subscribe_topic MQTT SUBSCRIBE Packet out-of-bounds

Summaryinfo

A vulnerability classified as critical has been found in Cesanta Mongoose 6.13. This impacts the function mg_mqtt_next_subscribe_topic of the component MQTT Parser. Performing a manipulation as part of MQTT SUBSCRIBE Packet results in out-of-bounds. This vulnerability is cataloged as CVE-2018-18765. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Cesanta Mongoose 6.13. It has been classified as critical. This affects the function mg_mqtt_next_subscribe_topic of the component MQTT Parser. The manipulation as part of a MQTT SUBSCRIBE Packet leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An exploitable arbitrary memory read vulnerability exists in the MQTT packet-parsing functionality of Cesanta Mongoose 6.13. It is a heap-based buffer over-read in mg_mqtt_next_subscribe_topic. A specially crafted MQTT SUBSCRIBE packet can cause an arbitrary 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 vulnerability.

The bug was discovered 10/25/2018. The weakness was shared 10/28/2018 (Website). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2018-18765 since 10/28/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entry VDB-126068 is related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Cesanta

Name

• Mongoose

Version

• 6.13

License

• open-source

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion