CVE-2017-2922

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2017-11-07 · updated 2026-06-17
Weakness: CWE-416

Description

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.

Affected products

Cesanta Mongoose: 6.8

References

https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0429
https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0429

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