CVE-2019-14809

Public Exploit

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.

9.8

CVSS

Severity: Critical

CVSS 3.0 •

CVSS 2.0 •

EPSS 4.74% Top 15%

Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com

Affected: n/a n/a

References

Link	Tags
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	exploit third party advisory patch
https://seclists.org/bugtraq/2019/Aug/31	third party advisory mailing list
https://www.debian.org/security/2019/dsa-4503	third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00076.html	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00002.html	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00011.html	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYO6E3H34C346D2E443GLXK7OK6KIYIQ/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BBP27PZGSY6OP6D26E5FW4GZKBFHNU7/	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00021.html	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00038.html	vendor advisory
https://access.redhat.com/errata/RHSA-2019:3433	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-14809?: CVE-2019-14809 has been scored as a critical severity vulnerability.
How to fix CVE-2019-14809?: To fix CVE-2019-14809, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-14809 being actively exploited in the wild?: It is possible that CVE-2019-14809 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.