Cyber Resilience

CVE-2024-42547

CriticalPublic PoC

Published: 12 August 2024

Published
12 August 2024
Modified
13 August 2024
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0053 67.5th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-42547 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Totolink A3100R Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 32.5% 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

TOTOLINK A3100R V4.1.2cu.5050_B20200504 has a buffer overflow vulnerability in the http_host parameter in the loginauth function.

CWE(s)
CWE-120

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

Buffer overflow in the loginauth function via http_host parameter in the router's web interface enables exploitation of a public-facing application for remote code execution.

Affected Assets

totolink
a3100r firmware
4.1.2cu.5050_b20200504

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.

SC-27 Platform-independent Applications
addresses: CWE-120

Platform-independent managed code eliminates the need for unchecked native buffer copies that are the root cause of classic buffer overflows.

References