CVE-2013-4434

Dropbear Ssh vulnerability

CVSS

5.0

EPSS

5.7%

EPSS pct

92th

Exploited

No known

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.

Affected vendor

Dropbear Ssh Project

Affected product

Dropbear Ssh

CVSS vector

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

Weakness type (CWE)

CWE-189

Published

2013-10-25

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality.

Its EPSS score of 5.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2013-4434

Confirm whether Dropbear Ssh Project Dropbear Ssh is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2013-4434.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2013-4434

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2013-4434 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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