CVEvulnerability
CVE-2021-29922
9.1 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2021-08-07
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.4 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:P
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.
Affected configurations
• rust-lang rust (< 1.53.0)
References
- https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis Third Party Advisory
- https://doc.rust-lang.org/beta/std/net/struct.Ipv4Addr.html Vendor Advisory
- https://github.com/rust-lang/rust/issues/83648 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/rust-lang/rust/pull/83652 Patch, Third Party Advisory
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-015.md Exploit, Third Party Advisory
- https://security.gentoo.org/glsa/202210-09 Third Party Advisory
- https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis Third Party Advisory
- https://doc.rust-lang.org/beta/std/net/struct.Ipv4Addr.html Vendor Advisory
- https://github.com/rust-lang/rust/issues/83648 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/rust-lang/rust/pull/83652 Patch, Third Party Advisory
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-015.md Exploit, Third Party Advisory
- https://security.gentoo.org/glsa/202210-09 Third Party Advisory