Description
net/url in Go before 1.11.13 and 1.12.x before 1.12.8 mishandles malformed hosts in URLs, leading to an authorization bypass in some applications. This is related to a Host field with a suffix appearing in neither Hostname() nor Port(), and is related to a non-numeric port number. For example, an attacker can compose a crafted javascript:// URL that results in a hostname of google.com.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 10 | golang-1.11 | 1.11.6-1+deb10u1 | DSA-4503-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | golang-1.8 +2 | No fix yet | — |
| Ubuntu 16.04 LTS | golang-1.6 +1 | No fix yet | — |
| Ubuntu 14.04 LTS | golang-1.10 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | go-toolset | 1.12.8-1.module+el8.1.0+4089+be929cf8 | RHSA-2019:3433 |
| RHEL 8 | golang +6 | 1.12.8-2.module+el8.1.0+4089+be929cf8 | RHSA-2019:3433 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Devtools 2019 | go-toolset-1.12 +9 | 1.12.8-2.el7 | RHEA-2019:4179 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | go1.11 | 1.11.13-10.5 | openSUSE-SU-2024:10804-1 |
| openSUSE Tumbleweed | go1.12 | 1.12.17-4.8 | openSUSE-SU-2024:10805-1 |
| openSUSE Leap 15.1 | go1.11 | 1.11.13-lp151.2.9.1 | openSUSE-SU-2019:2072-1 |
| openSUSE Leap 15.1 | go1.12 | 1.12.9-lp151.2.9.1 | openSUSE-SU-2019:2130-1, openSUSE-SU-2019:2085-1, openSUSE-SU-2019:2056-1 |
| openSUSE Leap 15.0 | go1.11 | 1.11.13-lp151.2.9.1 | openSUSE-SU-2019:2072-1 |
| openSUSE Leap 15.0 | go1.12 | 1.12.9-lp151.2.13.1 | openSUSE-SU-2019:2056-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | go | 1.12.8-r0 | — |
| Alpine v3.23 | go | 1.12.8-r0 | — |
| Alpine v3.22 | go | 1.12.8-r0 | — |
| Alpine v3.21 | go | 1.12.8-r0 | — |
| Alpine v3.20 | go | 1.12.8-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | go | 1.12.8-r0 | — |
| Alpine v3.18 | go | 1.12.8-r0 | — |
| Alpine v3.17 | go | 1.12.8-r0 | — |
| Alpine v3.16 | go | 1.12.8-r0 | — |
| Alpine v3.15 | go | 1.12.8-r0 | — |
| Alpine v3.14 | go | 1.12.8-r0 | — |
| Alpine v3.13 | go | 1.12.8-r0 | — |
| Alpine v3.12 | go | 1.12.8-r0 | — |
| Alpine v3.11 | go | 1.12.8-r0 | — |
| Alpine v3.10 | go | 1.12.8-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | golang +5 | 1.9.4-3.amzn2.0.3 | ALAS2-2019-1309 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | golang | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | go-toolset | 1.12.8-1.module+el8.1.0+5435+cbe0acb5 | ELSA-2019-3433 |
| Oracle Linux 8 | golang +6 | 1.12.8-2.0.1.module+el8.1.0+5435+cbe0acb5 | ELSA-2019-3433 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | stdlib | < 1.11.13 · >= 1.12.0-0, < 1.12.8 | 1.11.13, 1.12.8 | GO-2022-0211 |
Advisories 12
- RHSA-2019:3433 Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHEA-2019:4179 Red Hat Enhancement Advisory: new packages: go-toolset-1.12 Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DSA-4503-1 golang-1.11 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2019:2000-1 Security update for go1.12 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2085-1 Security update for go1.12 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2056-1 Security update for go1.12 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10804-1 go1.11-1.11.13-10.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2130-1 Security update for go1.12 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2072-1 Security update for go1.11 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10805-1 go1.12-1.12.17-4.8 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2019-1309 Moderate: golang security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 7, 2025
- ELSA-2019-3433 Moderate: go-toolset:ol8 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 14, 2019
References
- https://groups.google.com/forum/#%21topic/golang-announce/0uuMm1BwpHE
- https://groups.google.com/forum/#%21topic/golang-announce/65QixT3tcmg
- https://github.com/golang/go/issues/29098
- 20190819 [SECURITY] [DSA 4503-1] golang-1.11 security update mailing-list
- DSA-4503 vendor-advisory
- openSUSE-SU-2019:2000 vendor-advisory
- openSUSE-SU-2019:2056 vendor-advisory
- openSUSE-SU-2019:2072 vendor-advisory
- FEDORA-2019-55d101a740 vendor-advisory
- FEDORA-2019-65db7ad6c7 vendor-advisory
- openSUSE-SU-2019:2085 vendor-advisory
- openSUSE-SU-2019:2130 vendor-advisory
- RHSA-2019:3433 vendor-advisory