Reported

October 17, 2021

Issued

October 17, 2021 (last modified: June 13, 2023)

Package

abomonation (crates.io)

Type

INFO Unsound

Aliases

• CVE-2021-45708
• GHSA-5vwc-r48g-wj6c
• GHSA-hfxp-p695-629x

References

• https://github.com/TimelyDataflow/abomonation/issues/23

Patched

no patched versions

Description

This transmute is at the core of the abomonation crates. It's so easy to use it to violate alignment requirements that no test in the crate's test suite passes under miri. The use of this transmute in serialization/deserialization also incorrectly assumes that the layout of a repr(Rust) type is stable. This transmute can also disclose both the contents of padding bytes which may be an information leak and the contents of pointers, which may be used to defeat ASLR.

Advisory available under CC0-1.0 license.