Vulnerability Report

CVE-2021-29922

Title: IP address parsing bypass in Rust std net parser

Access Control Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2021-29922.

CWE Category NVD-CWE-noinfo

Published Date Aug 07, 2021

Modified Date Nov 21, 2024

Exploit Status Not Found

Score 9.1 CVSS v3.1

Exploit Probability (EPSS)

0.34%

Vulnerability Summary

CVE-2021-29922: 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.

Impacted Vendors

rust-lang 1

Reference Links

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 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

CVSS v3.1

Source Entity [email protected]

Severity CRITICAL

9.1

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

6.4

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:N/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-29922 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

November 21, 2024 MODIFIED

Vulnerability data or affected products updated.

August 07, 2021 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.