Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the…

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.

Scores

EPSS (exploitation in 30 days)

5.7% · top 6.9% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.

Weakness

• n/a
• CWE-189 (opens in a new tab)All about CWE-189 and its CVEs

Affected products

• n/a

  • affected n/a

References (8)

• 55173 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• https://matt.ucc.asn.au/dropbear/CHANGES (opens in a new tab)x_refsource_CONFIRMx_transferred
• 62993 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• [oss-security] 20131015 Re: CVE Request: dropbear sshd daemon 2013.59 release (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• openSUSE-SU-2013:1696 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• https://support.citrix.com/article/CTX216642 (opens in a new tab)x_refsource_CONFIRMx_transferred
• openSUSE-SU-2013:1616 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2013-4434](https://trackcve.app/badge/CVE-2013-4434.svg)](https://trackcve.app/cve/CVE-2013-4434)

Record last updated 6 Aug 2024, 16:45 UTC.