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CVE-2021-29923

Published: Aug 7, 2021

Modified: Aug 3, 2024

PUBLISHED

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://golang.org/pkg/net/#ParseCIDR

x_refsource_MISC

https://www.oracle.com/security-alerts/cpujan2022.html

x_refsource_MISC

https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis

x_refsource_MISC

https://github.com/golang/go/issues/43389

x_refsource_MISC

https://github.com/golang/go/issues/30999

x_refsource_MISC

https://go-review.googlesource.com/c/go/+/325829/

x_refsource_MISC

https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-016.md

x_refsource_MISC

FEDORA-2022-17d004ed71

vendor-advisory

x_refsource_FEDORA

vendor-advisory

x_refsource_GENTOO

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