Cesanta Mongoose 6.8 MQTT Packet Parser MQTT SUBSCRIBE Packet out-of-bounds

Summaryinfo

A vulnerability identified as critical has been detected in Cesanta Mongoose 6.8. Affected by this issue is some unknown functionality of the component MQTT Packet Parser. Performing a manipulation as part of MQTT SUBSCRIBE Packet results in out-of-bounds. This vulnerability is cataloged as CVE-2017-2895. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Cesanta Mongoose 6.8. This affects some unknown functionality of the component MQTT Packet 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 6.8. 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 10/31/2017. The weakness was shared 11/07/2017 (Website). The advisory is shared at talosintelligence.com. This vulnerability is uniquely identified as CVE-2017-2895 since 12/01/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 7 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 entries VDB-109211, VDB-109208, VDB-109207 and VDB-109206 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Cesanta

Name

• Mongoose

Version

• 6.8

License

• open-source

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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