CVE-2019-14809
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Go
PublishedAug 13, 2019
First seenAug 13, 2019
How to fix
Update
- golang go1.11.13, 1.12.8 or later
- stdlib1.11.13, 1.12.8 or later
Vendor advisories
- debian.org/security/2019/dsa-4503
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYO6E3H34C346D2E443GLXK7OK6KIYIQ/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BBP27PZGSY6OP6D26E5FW4GZKBFHNU7/
- access.redhat.com/errata/RHSA-2019:3433
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| golang go | v < 1.11.13, 1.12.0 ≤ v < 1.12.8 | 1.11.13, 1.12.8 |
| debian debian_linux | 10.0 | — |
| stdlibGo | v < 1.11.13, 1.12.0-0 ≤ v < 1.12.8 | 1.11.13, 1.12.8 |
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