// For flags

CVE-2019-12209

openSUSE Security Advisory - openSUSE-SU-2019:1725-1

Severity Score

7.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Yubico pam-u2f 1.0.7 attempts parsing of the configured authfile (default $HOME/.config/Yubico/u2f_keys) as root (unless openasuser was enabled), and does not properly verify that the path lacks symlinks pointing to other files on the system owned by root. If the debug option is enabled in the PAM configuration, part of the file contents of a symlink target will be logged, possibly revealing sensitive information.

Yubico pam-u2f 1.0.7 intenta analizar el archivo de configuración configurado (predeterminado $ HOME / .config / Yubico / u2f_keys) como root (a menos que se haya habilitado openasuser), y no verifica correctamente que la ruta carece de enlaces simbólicos que apuntan a otros archivos en el Sistema propiedad de root. Si la opción de depuración está habilitada en la configuración de PAM, se registrará parte del contenido del archivo de un objetivo de enlace simbólico, posiblemente revelando información confidencial.

An update that fixes three vulnerabilities is now available. This update for libu2f-host and pam_u2f to version 1.0.8 fixes the following issues. Security issues fixed for libu2f-host. Fixed a memory leak due to a wrong parse of init's response. Security issues fixed for pam_u2f. Fixed an issue where symlinks in the user's directory were followed. Fixed file descriptor leaks. 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
None
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-05-20 CVE Reserved
  • 2019-06-04 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-59: Improper Link Resolution Before File Access ('Link Following')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Yubico
Search vendor "Yubico"
 Pam-u2f
Search vendor "Yubico" for product "Pam-u2f"
 1.0.7
Search vendor "Yubico" for product "Pam-u2f" and version "1.0.7"
-
Affected