CVE-2021-29923
Published: 7 August 2021
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | Packages built using golang need to be rebuilt once the vulnerability has been fixed. This CVE entry does not list packages that need rebuilding outside of the main repository or the Ubuntu variants with PPA overlays. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
golang Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
| bionic |
Does not exist
|
|
| focal |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| upstream |
Needs triage
|
|
|
golang-1.10 Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Needs triage
|
|
| xenial |
Needs triage
|
|
| bionic |
Needs triage
|
|
| focal |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| upstream |
Needs triage
|
|
|
golang-1.13 Launchpad, Ubuntu, Debian |
impish |
Ignored
(end of life)
|
| jammy |
Needs triage
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| bionic |
Needs triage
|
|
| focal |
Needs triage
|
|
| upstream |
Needs triage
|
|
| hirsute |
Ignored
(end of life)
|
|
| xenial |
Needs triage
|
|
| kinetic |
Ignored
(end of life, was needs-triage)
|
|
|
golang-1.14 Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
| bionic |
Does not exist
|
|
| focal |
Needs triage
|
|
| upstream |
Needs triage
|
|
| hirsute |
Ignored
(end of life)
|
|
|
golang-1.15 Launchpad, Ubuntu, Debian |
impish |
Ignored
(end of life)
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
| bionic |
Does not exist
|
|
| focal |
Does not exist
|
|
| hirsute |
Ignored
(end of life)
|
|
|
golang-1.16 Launchpad, Ubuntu, Debian |
focal |
Needs triage
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Ignored
(end of standard support)
|
|
| hirsute |
Ignored
(end of life)
|
|
| bionic |
Needs triage
|
|
|
golang-1.6 Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Needs triage
|
|
| bionic |
Does not exist
|
|
| focal |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| upstream |
Needs triage
|
|
|
golang-1.8 Launchpad, Ubuntu, Debian |
focal |
Does not exist
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
| bionic |
Needs triage
|
|
|
golang-1.9 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| focal |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29923
- 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/
- https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis
- https://golang.org/pkg/net/#ParseCIDR
- NVD
- Launchpad
- Debian