CVE-2022-21658 Information

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.

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

Reference

https://github.com/rust-lang/rust/pull/93110 https://github.com/rust-lang/rust/pull/93110/commits/32ed6e599bb4722efefd78bbc9cd7ec4613cb946 https://github.com/rust-lang/rust/pull/93110/commits/406cc071d6cfdfdb678bf3d83d766851de95abaf https://blog.rust-lang.org/2022/01/20/cve-2022-21658.html https://github.com/rust-lang/rust/pull/93110/commits/4f0ad1c92ca08da6e8dc17838070975762f59714 https://github.com/rust-lang/rust/security/advisories/GHSA-r9cc-f5pr-p3j2 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BK32QZLHDC2OVLPKTUHNT2G3VHWHD4LX/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/C63NH72Q7UHJM5V3IVYRI7LVBGGFQMSQ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CKGTACKMKAPRDPWPTU26GYWBELIRFF5N/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7JKZDTBMGAWIFJSNWKBMPO5EAKRR4BEW/ https://support.apple.com/kb/HT213183 https://support.apple.com/kb/HT213182 https://support.apple.com/kb/HT213193 https://support.apple.com/kb/HT213186

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

HIGH

Base Severity

6.3