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CVE-2018-3878

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-08-23 · updated 2026-06-17
• Weakness: CWE-119

Description

Multiple exploitable buffer overflow vulnerabilities exist in the credentials handler of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250 devices with firmware version 0.20.17. The video-core process incorrectly extracts fields from a user-controlled JSON payload, leading to a buffer overflow on the stack. A strncpy overflows the destination buffer, which has a size of 16 bytes. An attacker can send an arbitrarily long "region" value in order to exploit this vulnerability.

Affected products

• Samsung SmartThings Hub STH-ETH-250: 0.20.17

References

• https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0555
• https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0555

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