CVE-2021-29923

NameCVE-2021-29923
DescriptionGo 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
golang-1.11 (PTS)buster, buster (security)1.11.6-1+deb10u4vulnerable
golang-1.15 (PTS)bullseye1.15.15-1~deb11u2vulnerable
bookworm, sid1.15.15-5vulnerable
golang-1.7 (PTS)stretch1.7.4-2+deb9u1vulnerable
stretch (security)1.7.4-2+deb9u3vulnerable
golang-1.8 (PTS)stretch1.8.1-1+deb9u1vulnerable
stretch (security)1.8.1-1+deb9u3vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
golang-1.11source(unstable)(unfixed)
golang-1.15source(unstable)(unfixed)
golang-1.16source(unstable)(unfixed)
golang-1.7source(unstable)(unfixed)
golang-1.8source(unstable)(unfixed)

Notes

[stretch] - golang-1.8 <ignored> (Minor issue, IP-based access control failure in specific cases, upstream won't fix supported releases for backward compatibility)
[stretch] - golang-1.7 <ignored> (Minor issue, IP-based access control failure in specific cases, upstream won't fix supported releases for backward compatibility)
https://github.com/golang/go/issues/30999
https://github.com/golang/go/issues/43389
https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-016.md
https://go-review.googlesource.com/c/go/+/325829/

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