Cesanta Mongoose 6.8 MQTT Packet Parser MQTT SUBSCRIBE Packet memory corruption

Summaryinfo

A vulnerability categorized as critical has been discovered in Cesanta Mongoose 6.8. Affected by this vulnerability is an unknown functionality of the component MQTT Packet Parser. Such manipulation as part of MQTT SUBSCRIBE Packet leads to memory corruption. This vulnerability is listed as CVE-2017-2894. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Cesanta Mongoose 6.8. Affected by this issue is an unknown functionality of the component MQTT Packet Parser. The manipulation as part of a MQTT SUBSCRIBE Packet leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An exploitable stack buffer overflow vulnerability exists in the MQTT packet parsing functionality of Cesanta Mongoose 6.8. A specially crafted MQTT SUBSCRIBE packet can cause a stack buffer overflow resulting in remote code execution. 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 presented 11/07/2017 (Website). The advisory is shared for download at talosintelligence.com. This vulnerability is handled as CVE-2017-2894 since 12/01/2016. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit 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.

See VDB-109211, VDB-109209, VDB-109207 and VDB-109206 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Cesanta

Name

• Mongoose

Version

• 6.8

License

• open-source

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion