In the standard library in Rust before 1.52.0, there is an optimization for joining strings that can cause uninitialized bytes to be exposed (or the program to crash) if the borrowed string changes after its length is checked.
Weakness
The product uses a function that accepts a format string as an argument, but the format string originates from an external source.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Rust | Rust-lang | * | 1.52.0 (excluding) |
| Red Hat Developer Tools | RedHat | rust-toolset-1.52-0:1.52.1-1.el7_9 | * |
| Red Hat Developer Tools | RedHat | rust-toolset-1.52-rust-0:1.52.1-2.el7_9 | * |
| Red Hat Enterprise Linux 8 | RedHat | rust-toolset:rhel8-8040020210603202531.2daa1a95 | * |
| Rustc | Ubuntu | bionic | * |
| Rustc | Ubuntu | esm-apps/focal | * |
| Rustc | Ubuntu | esm-apps/xenial | * |
| Rustc | Ubuntu | esm-infra-legacy/trusty | * |
| Rustc | Ubuntu | focal | * |
| Rustc | Ubuntu | groovy | * |
| Rustc | Ubuntu | hirsute | * |
| Rustc | Ubuntu | impish | * |
| Rustc | Ubuntu | jammy | * |
| Rustc | Ubuntu | kinetic | * |
| Rustc | Ubuntu | trusty | * |
| Rustc | Ubuntu | trusty/esm | * |
| Rustc | Ubuntu | xenial | * |
Potential Mitigations
Related Attack Patterns
References
- https://github.com/rust-lang/rust/issues/80335
- https://github.com/rust-lang/rust/pull/81728
- https://github.com/rust-lang/rust/pull/81728#issuecomment-821549174
- https://github.com/rust-lang/rust/pull/81728#issuecomment-824904190
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE/
- https://github.com/rust-lang/rust/issues/80335
- https://github.com/rust-lang/rust/pull/81728
- https://github.com/rust-lang/rust/pull/81728#issuecomment-821549174
- https://github.com/rust-lang/rust/pull/81728#issuecomment-824904190
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE/