CVE-2013-4434

Description

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.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 3.91% Top 15%
Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory secunia.com Vendor Advisory asn.au
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://secunia.com/advisories/55173 third party advisory vendor advisory
https://matt.ucc.asn.au/dropbear/CHANGES vendor advisory
http://www.securityfocus.com/bid/62993 vdb entry third party advisory
http://www.openwall.com/lists/oss-security/2013/10/16/11 third party advisory mailing list
http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html third party advisory vendor advisory
https://support.citrix.com/article/CTX216642 third party advisory
http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html third party advisory vendor advisory
https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2013-4434?
CVE-2013-4434 has been scored as a medium severity vulnerability.
How to fix CVE-2013-4434?
To fix CVE-2013-4434, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2013-4434 being actively exploited in the wild?
It is possible that CVE-2013-4434 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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