CVE-2022-21658

Rust is a multi-paradigm, general-purpose programming language designed for
performance and safety, especially safe concurrency. The Rust Security
Response WG was notified that the std::fs::remove_dir_all standard
library function is vulnerable a race condition enabling symlink following
(CWE-363). An attacker could use this security issue to trick a privileged
program into deleting files and directories the attacker couldn’t otherwise
access or delete. Rust 1.0.0 through Rust 1.58.0 is affected by this
vulnerability with 1.58.1 containing a patch. Note that the following build
targets don’t have usable APIs to properly mitigate the attack, and are
thus still vulnerable even with a patched toolchain: macOS before version
10.10 (Yosemite) and REDOX. We recommend everyone to update to Rust 1.58.1
as soon as possible, especially people developing programs expected to run
in privileged contexts (including system daemons and setuid binaries), as
those have the highest risk of being affected by this. Note that adding
checks in your codebase before calling remove_dir_all will not mitigate the
vulnerability, as they would also be vulnerable to race conditions like
remove_dir_all itself. The existing mitigation is working as intended
outside of race conditions.

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