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Vulnerability · Published Jan 20, 2022 · Assigned by GitHub_M

CVE-2022-21658Race condition in std::fs::remove_dir_all in rustlang

High 7.3

In plain English

A high-severity security flaw in rust from rust-lang. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.3High
Exploit odds (30 days)1.4%top 27.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Public PoC

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8cargo1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8cargo-doc1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8clippy1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rls1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust-analysis1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust-debugger-common1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust-doc1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust-gdb1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust-lldb1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust-src1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust-std-static1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust-std-static-wasm32-unknown-unknown1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust-std-static-wasm32-wasi1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rust-toolset1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
AlmaLinux:8rustfmt1.58.1-1.module_el8.6.0+2748+176088b3ALSA-2022:1894
Debian:12rustc1.57.0+dfsg1-1DEBIAN-CVE-2022-21658
Debian:13rustc1.57.0+dfsg1-1DEBIAN-CVE-2022-21658
Debian:14rustc1.57.0+dfsg1-1DEBIAN-CVE-2022-21658
Rocky Linux:8rust0:1.58.1-1.module+el8.6.0+826+60f85975RLSA-2022:1894
Rocky Linux:8rust-toolset0:1.58.1-1.module+el8.6.0+826+60f85975RLSA-2022:1894

Affected products (as reported)

VendorProductVersions
rust-lang rust < 1.58.1

Weakness: CWE-363, CWE-367 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H

References