// For flags

CVE-2021-29922

rust: incorrect parsing of extraneous zero characters at the beginning of an IP address string

Severity Score

9.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

2
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

El archivo library/std/src/net/parser.rs en Rust versiones anteriores a 1.53.0, no considera apropiadamente los caracteres cero extraños al principio de una cadena de direcciones IP, lo que (en algunas situaciones) permite a atacantes omitir el control de acceso que es basado en las direcciones IP, debido a una interpretación octal inesperada

A flaw was found in rust. Extraneous zero characters at the beginning of an IP address string are not properly considered which can allow an attacker to bypass IP-based access controls. The highest threat from this vulnerability is to data confidentiality and integrity.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-04-01 CVE Reserved
  • 2021-08-07 CVE Published
  • 2024-04-22 EPSS Updated
  • 2024-08-03 CVE Updated
  • 2024-08-03 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-20: Improper Input Validation
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Rust-lang
Search vendor "Rust-lang"
 Rust
Search vendor "Rust-lang" for product "Rust"
 < 1.53.0
Search vendor "Rust-lang" for product "Rust" and version " < 1.53.0"
-
Affected