VIR Vulnerability Intelligence Relay

CVE-2017-2921

critical
Published 2017-11-07 · Modified 2026-05-13
CVSS v3
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2
7.5
VIR risk
9.8

Description

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.

Predictions

Exploit likelihood
97%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2017-2921

OS impact
OSVersionStatusFixed in
debian debianbookwormfixed18.5.0~ds1-1
debian debianbullseyefixed18.5.0~ds1-1
debian debianforkyfixed18.5.0~ds1-1
debian debiansidfixed18.5.0~ds1-1
debian debiantrixiefixed18.5.0~ds1-1

Application impact
VendorProductVersionsFixed
cesantamongoose6.8

References

CWEs

CWE-190

Verify integrity in audit chain (admin only). AS-IS.