CVE-2021-29922 Information

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.

CVSS Vector

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

Reference

https://github.com/rust-lang/rust/pull/83652 https://doc.rust-lang.org/beta/std/net/struct.Ipv4Addr.html https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-015.md https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis https://github.com/rust-lang/rust/issues/83648

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.1