Cyber Resilience

CVE-2024-33897

CriticalPublic PoC

Published: 06 August 2024

Published
06 August 2024
Modified
21 November 2024
KEV Added
Patch
CVSS Score v3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS Score 0.0053 67.9th percentile
Risk Priority 19 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-33897 is a critical-severity Forced Browsing (CWE-425) vulnerability in Hms-Networks Ewon Cosy\+ Firmware. Its CVSS base score is 9.1 (Critical).

Operationally, ranked in the top 32.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

A compromised HMS Networks Cosy+ device could be used to request a Certificate Signing Request from Talk2m for another device, resulting in an availability issue. The issue was patched on the Talk2m production server on April 18, 2024.

CWE(s)

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

hms-networks
ewon cosy\+ firmware
21.0s0 — 21.2s10 · 22.0s0 — 22.1s3

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-425

Forcing a decision on every access request, including direct ones, reduces the exploitability of forced browsing by ensuring no unchecked access paths.

addresses: CWE-425

Forces all accesses through the reference monitor, preventing direct or forced requests that bypass checks.

addresses: CWE-425

Enforcing access for all logical requests prevents unauthorized direct access to protected resources.

addresses: CWE-425

Displaying the notification before further access on public systems prevents direct resource requests from bypassing the required system use terms and consent.

addresses: CWE-425

Decoy endpoints catch forced browsing and direct requests, deflecting attackers from legitimate resources while enabling analysis.

addresses: CWE-425

Blocks unauthorized direct requests or forced browsing by denying input access to non-authorized actors.

References