CVE-2021-29923

 

Published at: - 07-08-2021 07:15

Last modified: - 14-09-2022 11:11

Total changes: - 10

Description

Go before 1.17 does not properly consider extraneous zero characters at the beginning of an IP address octet, which (in some situations) allows attackers to bypass access control that is based on IP addresses, because of unexpected octal interpretation. This affects net.ParseIP and net.ParseCIDR.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://github.com/golang/go/issues/43389
• https://github.com/golang/go/issues/30999
• https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis
• https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-016.md
• https://golang.org/pkg/net/#ParseCIDR
• https://go-review.googlesource.com/c/go/+/325829/
• https://www.oracle.com/security-alerts/cpujan2022.html
• FEDORA-2022-17d004ed71-Mailing List, Third Party Advisory
• GLSA-202208-02-Third Party Advisory

 

Keywords

NVD

 

CVE-2021-29923

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures