MEDIUM
CVE-2013-4434
CWE-189Published: October 25, 2013· Updated: Jun 16, 2026
5.0
CVSS v3.1
Official 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.
Technical Analysis
CVE-2013-4434 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityP
IntegrityNone
AvailabilityNone
AV:N/AC:L/Au:N/C:P/I:N/A:N
Affected Vendors & Products
dropbear_ssh_project1 product(s)
dropbear ssh
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (16)
→
http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.htmlThird Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.htmlThird Party Advisory
→
http://secunia.com/advisories/55173Vendor Advisory
→
http://www.openwall.com/lists/oss-security/2013/10/16/11Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/62993Third Party Advisory · VDB Entry
→
https://matt.ucc.asn.au/dropbear/CHANGESVendor Advisory
→
https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409aPatch · Third Party Advisory
→
https://support.citrix.com/article/CTX216642Third Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.htmlThird Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.htmlThird Party Advisory
→
http://secunia.com/advisories/55173Vendor Advisory
→
http://www.openwall.com/lists/oss-security/2013/10/16/11Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/62993Third Party Advisory · VDB Entry
→
https://matt.ucc.asn.au/dropbear/CHANGESVendor Advisory
→
https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409aPatch · Third Party Advisory
Quick Facts
CVE IDCVE-2013-4434
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-189
CISA KEVNo
Affected1 vendor(s)
PublishedOct 25, 2013
Related CVEs (CWE-189)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2013-4434 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.