CVE-2020-14199 Business logic in n/a
Attackers can trick users into signing malicious Segwit transactions, causing excessive fees, affecting Bitcoin hardware wallets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-14199?
CVE-2020-14199 is a medium-severity vulnerability in n/a, published on 16 Jun 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction, which allows attackers to trick a user into making two signatures in certain cases, potentially leading to a huge transaction fee. NOTE: this affects all hardware wallets. It was fixed in 1.9.1 for the Trezor One and 2.3.1 for the Trezor Model T.
Weakness: CWE-347
Which versions are affected by CVE-2020-14199?
It affects 2 products.
Products include Satoshilabs Trezor Model T Firmware, Satoshilabs Trezor One Firmware.
How do I fix CVE-2020-14199?
No fix has been published for CVE-2020-14199 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-14199 being exploited?
There is no known exploitation of CVE-2020-14199 in the wild and no public exploit code.
Sources
Also known as GHSA-w7fh-c4r8-v8g4.