GHSA-xfrc-7mj2-5xh9 Undefined Behavior in zencashjs
Incorrect address type detection in zencashjs can cause funds sent to specific mainnet P2SH addresses to be lost due to prefix collision with testnet addresses.
- 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
- Available
What is GHSA-xfrc-7mj2-5xh9?
GHSA-xfrc-7mj2-5xh9 is a vulnerability in zencashjs, published on 3 Sep 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
Versions of zencashjs prior to 1.2.0 may cause loss of funds when used with cryptocurrency wallets. The package relies on a string comparison of the first two characters of a Horizen address to determine the destination address type of a transaction (P2PKH or P2SH). Due to the base58 address prefixes chosen in Horizen there exists the possibility of a clash of address prefixes for testnet P2PKH and mainnet P2SH addresses, testnet P2PKH addresses start with “zt” while a subset of mainnet P2SH addresses can also start with “zt”. The package interprets transactions sent to a “zt” P2SH address on mainnet as P2PKH transactions erroneously. Any funds sent to a mainnet P2SH multisignature address starting with “zt” will be sent to the wrong address and be lost.
Recommendation
Upgrade to version 1.2.0 or later.
Which versions are affected by GHSA-xfrc-7mj2-5xh9?
2 open source packages ship an affected version, including zencashjs.
| Package | Affected | Fixed in |
|---|---|---|
zencashjs npm | All versions | 1.2.0 |
zencashjs npm | All versions | 1.2.0 |
How do I fix GHSA-xfrc-7mj2-5xh9?
Upgrade zencashjs to 1.2.0 or later.
Is GHSA-xfrc-7mj2-5xh9 being exploited?
There is no known exploitation of GHSA-xfrc-7mj2-5xh9 in the wild and no public exploit code.