Vulnerability Name:

CVE-2013-4434

Assigned:2013-06-12
Published:2013-10-25
Updated:2017-11-14
Summary:Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.
CVSS v3 Severity:5.3 Medium (CCN CVSS v3 Vector: CVSS:3.0/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:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
3.7 Low (Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
3.7 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-189
References:Source: SUSE
Type: UNKNOWN
openSUSE-SU-2013:1616

Source: SUSE
Type: UNKNOWN
openSUSE-SU-2013:1696

Source: MLIST
Type: UNKNOWN
[oss-security] 20131015 Re: CVE Request: dropbear sshd daemon 2013.59 release

Source: BID
Type: UNKNOWN
62993

Source: XF
Type: UNKNOWN
dropbear-user-info-disc(87849)

Source: CONFIRM
Type: UNKNOWN
https://matt.ucc.asn.au/dropbear/CHANGES

Source: CONFIRM
Type: PATCH
https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a

Source: CONFIRM
Type: UNKNOWN
https://support.citrix.com/article/CTX216642

Vulnerable Configuration:Configuration 1:
  • cpe:/a:matt_johnston:dropbear_ssh_server:0.28:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.29:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.30:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.31:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.32:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.33:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.34:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.35:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.36:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.37:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.38:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.39:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.40:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.41:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.42:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.43:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.44:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.44:test1:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.44:test2:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.44:test3:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.44:test4:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.45:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.46:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.47:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.48:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.48.1:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.49:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.50:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.51:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.52:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.53:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:0.53.1:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:2011.54:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:2012.55:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:2013.56:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:2013.57:*:*:*:*:*:*:*
  • OR cpe:/a:matt_johnston:dropbear_ssh_server:2013.58:*:*:*:*:*:*:*

  • Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:20134434
    V
    CVE-2013-4434
    2017-03-01
    oval:com.ubuntu.precise:def:20134434000
    V
    CVE-2013-4434 on Ubuntu 12.04 LTS (precise) - medium.
    2013-10-25
    oval:com.ubuntu.trusty:def:20134434000
    V
    CVE-2013-4434 on Ubuntu 14.04 LTS (trusty) - medium.
    2013-10-25
    oval:com.ubuntu.xenial:def:20134434000
    V
    CVE-2013-4434 on Ubuntu 16.04 LTS (xenial) - medium.
    2013-10-25
    BACK
    matt_johnston dropbear_ssh_server 0.28
    matt_johnston dropbear_ssh_server 0.29
    matt_johnston dropbear_ssh_server 0.30
    matt_johnston dropbear_ssh_server 0.31
    matt_johnston dropbear_ssh_server 0.32
    matt_johnston dropbear_ssh_server 0.33
    matt_johnston dropbear_ssh_server 0.34
    matt_johnston dropbear_ssh_server 0.35
    matt_johnston dropbear_ssh_server 0.36
    matt_johnston dropbear_ssh_server 0.37
    matt_johnston dropbear_ssh_server 0.38
    matt_johnston dropbear_ssh_server 0.39
    matt_johnston dropbear_ssh_server 0.40
    matt_johnston dropbear_ssh_server 0.41
    matt_johnston dropbear_ssh_server 0.42
    matt_johnston dropbear_ssh_server 0.43
    matt_johnston dropbear_ssh_server 0.44
    matt_johnston dropbear_ssh_server 0.44 test1
    matt_johnston dropbear_ssh_server 0.44 test2
    matt_johnston dropbear_ssh_server 0.44 test3
    matt_johnston dropbear_ssh_server 0.44 test4
    matt_johnston dropbear_ssh_server 0.45
    matt_johnston dropbear_ssh_server 0.46
    matt_johnston dropbear_ssh_server 0.47
    matt_johnston dropbear_ssh_server 0.48
    matt_johnston dropbear_ssh_server 0.48.1
    matt_johnston dropbear_ssh_server 0.49
    matt_johnston dropbear_ssh_server 0.50
    matt_johnston dropbear_ssh_server 0.51
    matt_johnston dropbear_ssh_server 0.52
    matt_johnston dropbear_ssh_server 0.53
    matt_johnston dropbear_ssh_server 0.53.1
    matt_johnston dropbear_ssh_server 2011.54
    matt_johnston dropbear_ssh_server 2012.55
    matt_johnston dropbear_ssh_server 2013.56
    matt_johnston dropbear_ssh_server 2013.57
    matt_johnston dropbear_ssh_server 2013.58