CVE-2022-31100 – rulex

Package

Manager: cargo
Name: rulex
Vulnerable Version: >=0 <0.4.3

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS: 0.00398 pctl0.59818

Details

Reachable Assertion in rulex ### Impact When parsing untrusted rulex expressions, rulex may crash, possibly enabling a Denial of Service attack. This happens when the expression contains a multi-byte UTF-8 code point in a string literal or after a backslash, because rulex tries to slice into the code point and panics as a result. This is a security concern for you, if - your service parses untrusted rulex expressions (expressions provided by an untrusted user), and - your service becomes unavailable when the thread running rulex panics. ### Patches The crashes are fixed in version **0.4.3**. Affected users are advised to update to this version. ### Workarounds You can use `catch_unwind` to recover from panics. ### For more information If you have any questions or comments about this advisory: * Open an issue in [rulex](https://github.com/rulex-rs/rulex/issues) * Email me at [ludwig.stecher@gmx.de](mailto:ludwig.stecher@gmx.de) ### Credits Credit for finding these bugs goes to - [cargo fuzz](https://github.com/rust-fuzz/cargo-fuzz) and [afl.rs](https://github.com/rust-fuzz/afl.rs) - [evanrichter](https://github.com/evanrichter) - [ForAllSecure Mayhem](https://forallsecure.com/)

Metadata

Created: 2022-06-21T20:12:15Z
Modified: 2022-06-29T21:42:56Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/06/GHSA-8v9w-p43c-r885/GHSA-8v9w-p43c-r885.json
CWE IDs: ["CWE-617"]
Alternative ID: GHSA-8v9w-p43c-r885
Finding: F138
Auto approve: 1