// For flags

CVE-2016-4476

Ubuntu Security Notice USN-3455-1

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

hostapd 0.6.7 through 2.5 and wpa_supplicant 0.6.7 through 2.5 do not reject
and \r characters in passphrase parameters, which allows remote attackers to cause a denial of service (daemon outage) via a crafted WPS operation.

hostapd 0.6.7 hasta la versión 2.5 y wpa_supplicant 0.6.7 hasta la versión 2.5 no rechaza caracteres
y \r en parámetros passphrase, lo que permite a atacantes remotos provocar una denegación de servicio (corte de demonio) a través de una operación WPS manipulada.

Mathy Vanhoef discovered that wpa_supplicant and hostapd incorrectly handled WPA2. A remote attacker could use this issue with using key reinstallation attacks to obtain sensitive information. Imre Rad discovered that wpa_supplicant and hostapd incorrectly handled invalid characters in passphrase parameters. A remote attacker could use this issue to cause a denial of service. Various other issues were also addressed.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2016-05-03 CVE Reserved
  • 2016-05-09 CVE Published
  • 2024-08-06 CVE Updated
  • 2025-04-23 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
W1.fi
Search vendor "W1.fi"
 Hostapd
Search vendor "W1.fi" for product "Hostapd"
 >= 0.6.7 <= 2.5
Search vendor "W1.fi" for product "Hostapd" and version " >= 0.6.7 <= 2.5"
-
Affected
W1.fi
Search vendor "W1.fi"
 WPA Supplicant
Search vendor "W1.fi" for product "WPA Supplicant"
 >= 0.6.7 <= 2.5
Search vendor "W1.fi" for product "WPA Supplicant" and version " >= 0.6.7 <= 2.5"
-
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 14.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"
esm
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 16.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"
lts
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 17.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "17.04"
-
Affected