CVE-2013-4434
MEDIUM · CVSS 5.0EPSS 5.7%EU EUVD
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.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:N- Weakness (CWE)
- CWE-189
- EPSS score
- 5.7% (93th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2013-4311)
- Published
- October 25, 2013
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2013-4311 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- dropbear ssh project / dropbear ssh
References
- http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html(Third Party Advisory)
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html(Third Party Advisory)
- http://secunia.com/advisories/55173(Vendor Advisory)
- http://www.openwall.com/lists/oss-security/2013/10/16/11(Mailing List, Third Party Advisory)
- http://www.securityfocus.com/bid/62993(Third Party Advisory, VDB Entry)
- https://matt.ucc.asn.au/dropbear/CHANGES(Vendor Advisory)
- https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a(Patch, Third Party Advisory)
- https://support.citrix.com/article/CTX216642(Third Party Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain