What is the CVSS score of CVE-2023-27892?

CVE-2023-27892 has a CVSS 3.1 base score of 5.7 (Medium). CVSS vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H. EPSS exploitation probability: 0.5%.

Is there a public PoC exploit available for CVE-2023-27892?

Yes, a public proof-of-concept exploit is available for CVE-2023-27892. Prioritise patching immediately. EPSS: 0.5%.

Is there a patch available for CVE-2023-27892?

Yes, a patch is available for CVE-2023-27892. Update the affected software to the latest version immediately.

Keepkey Firmware CVE-2023-27892

MEDIUM

Out-of-bounds Read (CWE-125)

2023-05-02 cve@mitre.org

Buffer Overflow Information Disclosure Keepkey Firmware

5.7

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.7 MEDIUM

AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector

Physical

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

May 02, 2023 - 21:15 nvd

MEDIUM 5.7

DescriptionNVD

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.

AnalysisAI

Insufficient length checks in the ShapeShift KeepKey hardware wallet firmware before 7.7.0 allow a global buffer overflow via crafted messages. Rated medium severity (CVSS 5.7), this vulnerability is no authentication required. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. 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. Affected products include: Shapeshift Keepkey Firmware. Version information: before 7.7.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.