A vulnerability was found in Cesanta Mongoose 6.8 and classified as critical. Affected by this issue is some unknown processing of the component WebSocket. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An exploitable memory corruption vulnerability exists in the Websocket protocol implementation of Cesanta Mongoose 6.8. A specially crafted websocket packet can cause a buffer to be allocated while leaving stale pointers which leads to a use-after-free vulnerability which can be exploited to achieve remote code execution. An attacker needs to send a specially crafted websocket packet over the network to trigger this vulnerability.

The bug was discovered 10/31/2017. The weakness was published 11/07/2017 (Website). The advisory is shared for download at talosintelligence.com. This vulnerability is handled as CVE-2017-2922 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.

Similar entry is available at 109219.

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Vendor

• Cesanta

Name

• Mongoose

Version

• 6.8

License

• open-source

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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