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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5 UNKNOWN
NETWORK
LOW
AV:N/AC:L/Au:N/C:P/I:N/A:N
redhatCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 87%
VendorProductVersion
dropbear_ssh_projectdropbear_ssh
𝑥
< 2013.59
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
dropbear
bullseye
2020.81-3+deb11u2
fixed
squeeze
no-dsa
wheezy
no-dsa
bookworm
2022.83-1+deb12u2
fixed
sid
2024.86-1
fixed
trixie
2024.86-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
dropbear
zesty
not-affected
yakkety
not-affected
xenial
not-affected
wily
not-affected
vivid
not-affected
utopic
not-affected
trusty
dne
saucy
ignored
raring
ignored
quantal
ignored
precise
ignored
lucid
ignored
Common Weakness Enumeration
References
http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html
http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html
http://secunia.com/advisories/55173
http://www.openwall.com/lists/oss-security/2013/10/16/11
http://www.securityfocus.com/bid/62993
https://matt.ucc.asn.au/dropbear/CHANGES
https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a
https://support.citrix.com/article/CTX216642
http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html
http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html
http://secunia.com/advisories/55173
http://www.openwall.com/lists/oss-security/2013/10/16/11
http://www.securityfocus.com/bid/62993
https://matt.ucc.asn.au/dropbear/CHANGES
https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a
https://support.citrix.com/article/CTX216642