VDB-227904 · CVE-2023-27892 · EUVD-2023-31626

ShapeShift KeepKey up to 7.6.x ethereum_contracts.c cf_confirmExecTx buffer overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.7	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in ShapeShift KeepKey up to 7.6.x. The affected element is the function cf_confirmExecTx of the file ethereum_contracts.c. The manipulation results in buffer overflow. This vulnerability is cataloged as CVE-2023-27892. An attack on the physical device is feasible. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in ShapeShift KeepKey up to 7.6.x. It has been classified as problematic. Affected is the function cf_confirmExecTx of the file ethereum_contracts.c. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality. CVE summarizes:

Insufficient length checks in the ShapeShift KeepKey hardware wallet firmware before 7.7.0 allow a global buffer overflow via crafted messages. Flaws in cf_confirmExecTx() in ethereum_contracts.c can be used to reveal arbitrary microcontroller memory on the device screen or crash the device. With physical access to a PIN-unlocked device, attackers can extract the BIP39 mnemonic secret from the hardware wallet.

The weakness was shared 05/03/2023. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2023-27892 since 03/06/2023. There are known technical details, but no exploit is available.

Upgrading to version 7.7.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-31626). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

ShapeShift

Name

KeepKey

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.7

VulDB Base Score: 1.6
VulDB Temp Score: 1.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.7
NVD Vector: 🔍

CNA Base Score: 3.8
CNA Vector (MITRE): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: KeepKey 7.7.0
Patch: github.com

Timelineinfo

03/06/2023 🔍
05/03/2023 +57 days 🔍
05/03/2023 +0 days 🔍
11/25/2025 +937 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2023-27892 (🔍)
GCVE (CVE): GCVE-0-2023-27892
GCVE (VulDB): GCVE-100-227904
EUVD: 🔍

Entryinfo

Created: 05/03/2023 07:47
Updated: 11/25/2025 09:49
Changes: 05/03/2023 07:47 (52), 05/27/2023 07:11 (11), 11/25/2025 09:49 (15)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.