Vulnerability in Dropbear SSH Project
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.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.057 (92.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.057 · newest: 0.057 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secunia.com/advisories/55173 (Vendor Advisory, third-party-advisory)
- matt.ucc.asn.au/dropbear/CHANGES (Vendor Advisory)
- www.securityfocus.com/bid/62993 (VDB Entry, Third Party Advisory, vdb-entry)
- www.openwall.com/lists/oss-security/2013/10/16/11 (mailing-list, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-updates/2013-11/msg00046.html (vendor-advisory, Third Party Advisory)
- support.citrix.com/article/CTX216642 (Third Party Advisory)
- lists.opensuse.org/opensuse-updates/2013-10/msg00061.html (vendor-advisory, Third Party Advisory)
- secure.ucc.asn.au/hg/dropbear/rev/d7784616409a (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2013-4434?
- CVE-2013-4434 is a vulnerability in Dropbear SSH Project, classified under CWE-189. Published 2013-10-25.
- Is CVE-2013-4434 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.