Vulnerability Name:

CVE-2011-4408 (CCN-76112)

Assigned:2011-11-07
Published:2012-06-06
Updated:2017-08-29
Summary:The Single Sign On Client (ubuntu-sso-client) for Ubuntu 11.04 and 11.10 does not properly validate SSL certificates when using HTTPS, which allows remote attackers to spoof a server and modify or read sensitive data via a man-in-the-middle (MITM) attack.
CVSS v3 Severity:5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
5.0 Medium (Temporal CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
4.3 Medium (CCN CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N)
3.2 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-Other
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2011-4408

Source: OSVDB
Type: UNKNOWN
82747

Source: SECUNIA
Type: Vendor Advisory
49448

Source: CCN
Type: OSVDB ID: 82747
Ubuntu Single Sign On Client SSL Certificate Verification MitM Spoofing Weakness

Source: BID
Type: UNKNOWN
53829

Source: CCN
Type: BID-53829
Ubuntu 'ubuntu-sso-client' Package SSL Certificate Validation Information Disclosure Vulnerability

Source: UBUNTU
Type: Patch, Vendor Advisory
USN-1464-1

Source: CCN
Type: Ubuntu Bug #882055
ubuntu-sso-client doesn't validate ssl certificates

Source: XF
Type: UNKNOWN
ubuntussoclient-ssl-info-disc(76112)

Source: XF
Type: UNKNOWN
ubuntussoclient-ssl-info-disc(76112)

Vulnerable Configuration:Configuration 1:
  • cpe:/o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.mitre.oval:def:17963
    P
    USN-1464-1 -- ubuntu-sso-client vulnerability
    2014-06-30
    oval:com.ubuntu.precise:def:20114408000
    V
    CVE-2011-4408 on Ubuntu 12.04 LTS (precise) - medium.
    2012-06-15
    BACK
    canonical ubuntu linux 11.04
    canonical ubuntu linux 11.10