Vulnerability Monitor

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CVE-2013-4434

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.

Published

2013-10-25T23:55:03.957

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-189

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	dropbear_ssh_project	dropbear_ssh	< 2013.59	Yes

References

http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html Third Party Advisory ([email protected])
http://secunia.com/advisories/55173 Vendor Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2013/10/16/11 Mailing List, Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/62993 Third Party Advisory, VDB Entry ([email protected])
https://matt.ucc.asn.au/dropbear/CHANGES Vendor Advisory ([email protected])
https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a Patch, Third Party Advisory ([email protected])
https://support.citrix.com/article/CTX216642 Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/55173 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2013/10/16/11 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/62993 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://matt.ucc.asn.au/dropbear/CHANGES Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.citrix.com/article/CTX216642 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)