Out-of-bounds Read in Shapeshift Keepkey
CVE-2023-27892
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/keepkey/keepkey-firmware/pull/337 (Patch)
- blog.inhq.net/posts/keepkey-CVE-2023-27892/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-27892?
- CVE-2023-27892 is a low-severity vulnerability in Shapeshift Keepkey, classified under Out-of-bounds Read. CVSS score: 3.8/10. Published 2023-05-02.
- How severe is CVE-2023-27892?
- Low severity. CVSS v3 base score is 3.8 out of 10.