GIGABYTE BRIX UEFI firmware is not cryptographically signed

published 2018-07-09 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-12324

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

GIGABYTE BRIX UEFI firmware does not cryptographically validate images prior to updating the system firmware. Additionally, the firmware updates are served over HTTP. An attacker can make arbitrary modifications to firmware images without being detected.

Exploit prediction

1.58% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

cylance.com https://www.cylance.com/en_us/blog/gigabyte-brix-systems-vulnerabilities.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

GIGABYTE GB-BSi7H-6500
GIGABYTE GB-BXi7-5775

Classification

Weakness

CWE-345 Insufficient Verification of Data Authenticity
CWE-311 Missing Encryption of Sensitive Data
CWE-347 Improper Verification of Cryptographic Signature

References

cylance.com /en_us/blog/gigabyte-brix-systems-vulnerabilities.html
exploit, third-party-advisory
kb.cert.org /vuls/id/507496
third-party-advisory, us-government-resource
securityfocus.com /bid/97294
vdb-entry, third-party-advisory

Sources

CVE List CVE-2017-3198
NVD CVE-2017-3198

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary