CVE-2021-29922

Public Exploit

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.

9.1

CVSS

Severity: Critical

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.19%

Vendor Advisory gentoo.org Vendor Advisory rust-lang.org

Affected: n/a n/a

References

Link	Tags
https://doc.rust-lang.org/beta/std/net/struct.Ipv4Addr.html	vendor advisory
https://github.com/rust-lang/rust/pull/83652	third party advisory patch
https://github.com/rust-lang/rust/issues/83648	issue tracking patch exploit third party advisory
https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-015.md	third party advisory exploit
https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis	third party advisory
https://security.gentoo.org/glsa/202210-09	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-29922?: CVE-2021-29922 has been scored as a critical severity vulnerability.
How to fix CVE-2021-29922?: To fix CVE-2021-29922, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-29922 being actively exploited in the wild?: It is possible that CVE-2021-29922 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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