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CVE-2021-29922

Published: 7 August 2021

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.

Priority

Medium

Cvss 3 Severity Score

9.1

Score breakdown

Status

Package Release Status
rustc
Launchpad, Ubuntu, Debian
impish Ignored
(end of life)
jammy
Released (1.53.0+dfsg1+llvm-4ubuntu1)
lunar Not vulnerable
(1.61.0+dfsg1-1~exp1ubuntu1)
trusty Needed

upstream
Released (1.53.0)
bionic Not vulnerable
(1.53.0+dfsg1+llvm-4ubuntu1~18.04.1)
focal
Released (1.53.0+dfsg1+llvm-4ubuntu1~20.04.1)
hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needed)
xenial Needed

groovy Ignored
(end of life)
mantic Not vulnerable
(1.67.1+dfsg0ubuntu1-0ubuntu2)

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