- Reported
-
- Issued
-
- Package
-
borsh
(crates.io)
- Type
-
INFO
Unsound
- Categories
-
- Details
-
https://github.com/near/borsh-rs/issues/19
- Patched
-
no patched versions
Description
Affected versions of borsh cause undefined behavior when zero-sized-types (ZST)
are parsed and the Copy/Clone traits are not implemented/derived.
For instance if 1000 instances of a ZST are deserialized, and the ZST is not copy
(this can be achieved through a singleton), then accessing/writing to deserialized
data will cause a segmentation fault.
There is currently no way for borsh to read data without also providing a Rust type.
Therefore, if not ZST are used for serialization, then you are not affected by this issue.