CVE-2021-29922
Published: August 31, 2023Last modified: August 31, 2023
Description
library/std/src/net/parser.rs in Rust before 1.53.0 does not properly consider extraneous zero characters at the beginning of an IP address string, which (in some situations) allows attackers to bypass access control that is based on IP addresses, because of unexpected octal interpretation.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.1 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | rust | Not affected (1.64.0-r2) |
| Stream | rust | Not affected (1.71.1-r1) |
References
- https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis
- https://doc.rust-lang.org/beta/std/net/struct.Ipv4Addr.html
- https://github.com/rust-lang/rust/issues/83648
- https://github.com/rust-lang/rust/pull/83652
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-015.md
- https://security.gentoo.org/glsa/202210-09