An exploitable memory corruption vulnerability exists in the Websocket protocol implementation of Cesanta Mongoose 6.8.

Published 9 y ago 2017-11-07 · modified 4 mo ago 2026-06-17 · JSON

CVSS

8.1

v3.0 · CNA

CISA KEV

not known exploited

EPSS

2.4%

percentile 84%

Public exploits

none known

An exploitable memory corruption vulnerability exists in the Websocket protocol implementation of Cesanta Mongoose 6.8. A specially crafted websocket packet can cause an integer overflow, leading to a heap buffer overflow and resulting in denial of service and potential remote code execution. An attacker needs to send a specially crafted websocket packet over network to trigger this vulnerability.

Exploit prediction (EPSS)

2.42% probability of exploitation in the next 30 days, higher than 84% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CNA	3.0	8.1	`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`
NVD	3.1	9.8	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CNA	3.0	8.1	`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`
NVD	2.0	7.5	`AV:N/AC:L/Au:N/C:P/I:P/A:P`

Affected products

Cesanta Mongoose

Classification

Weakness

CWE-190 Integer Overflow or Wraparound

References

talosintelligence.com /vulnerability_reports/TALOS-2017-0428 · x_refsource_MISC, x_transferred

Sources

CVE List: CVE-2017-2921
NVD: CVE-2017-2921

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