// For flags

CVE-2019-14809

golang: malformed hosts in URLs leads to authorization bypass

Severity Score

9.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

net / url in Go antes del 1.11.13 y 1.12.x antes del 1.12.8 maneja mal los hosts mal formados en las URL, lo que lleva a una omisión de autorización en algunas aplicaciones. Esto está relacionado con un campo Host con un sufijo que no aparece en Hostname () ni Port (), y está relacionado con un número de puerto no numérico. Por ejemplo, un atacante puede componer un javascript creado: // URL que da como resultado un nombre de host de google.com.

An update that solves three vulnerabilities and has two fixes is now available. This update for go1.12 fixes the following issues. Fixed HTTP/2 flood using PING frames that results in unbounded memory growth. Fixed HTTP/2 implementation that is vulnerable to a reset flood, potentially leading to a denial of service. Fixed malformed hosts in URLs that leads to authorization bypass. This update was imported from the SUSE:SLE-15:Update update project.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-08-10 CVE Reserved
  • 2019-08-13 CVE Published
  • 2024-08-05 CVE Updated
  • 2024-08-05 First Exploit
  • 2025-08-20 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-285: Improper Authorization
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Golang
Search vendor "Golang"
 Go
Search vendor "Golang" for product "Go"
 < 1.11.13
Search vendor "Golang" for product "Go" and version " < 1.11.13"
-
Affected
Golang
Search vendor "Golang"
 Go
Search vendor "Golang" for product "Go"
 >= 1.12.0 < 1.12.8
Search vendor "Golang" for product "Go" and version " >= 1.12.0 < 1.12.8"
-
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 10.0
Search vendor "Debian" for product "Debian Linux" and version "10.0"
-
Affected