CVE-2022-21658

NameCVE-2022-21658
DescriptionRust 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
rustc (PTS)buster1.41.1+dfsg1-1~deb10u1vulnerable
bullseye1.48.0+dfsg1-2vulnerable
bookworm1.60.0+dfsg1-1fixed
sid1.61.0+dfsg1-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
rustcsourceexperimental1.57.0+dfsg1-1~exp1
rustcsource(unstable)1.57.0+dfsg1-1

Notes

[bullseye] - rustc <no-dsa> (Minor issue)
[buster] - rustc <no-dsa> (Minor issue)
[stretch] - rustc <no-dsa> (Minor issue)
https://github.com/rust-lang/wg-security-response/tree/master/patches/CVE-2022-21658
https://www.openwall.com/lists/oss-security/2022/01/20/1

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