MEDIUM
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 Oct 25, 2013
5.0
MEDIUMCVSS 2.0
EPSS 5.75%
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.
Affected products
No data.
- < 2013.59
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:P/I:N/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
5.75% 0.05749
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.05749
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (34 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 5.75% (0.05749) | 92.84th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.75% (0.05749) | 92.06th | v5 (v2026.06.15) |
| Sep 26, 2025 | 1.91% (0.01912) | 82.66th | v4 (v2025.03.14) |
| Sep 4, 2025 | 3.91% (0.03905) | 87.84th | v4 (v2025.03.14) |
| Sep 1, 2025 | 2.13% (0.02131) | 83.58th | v4 (v2025.03.14) |
| Aug 4, 2025 | 3.91% (0.03905) | 87.85th | v4 (v2025.03.14) |
| Aug 1, 2025 | 2.13% (0.02131) | 83.57th | v4 (v2025.03.14) |
| Jul 4, 2025 | 3.91% (0.03905) | 87.79th | v4 (v2025.03.14) |
| Jul 1, 2025 | 2.13% (0.02131) | 83.46th | v4 (v2025.03.14) |
| Jun 5, 2025 | 3.91% (0.03905) | 87.72th | v4 (v2025.03.14) |
| Jun 1, 2025 | 2.13% (0.02131) | 83.38th | v4 (v2025.03.14) |
| May 4, 2025 | 3.91% (0.03905) | 87.65th | v4 (v2025.03.14) |
| May 1, 2025 | 2.13% (0.02131) | 83.28th | v4 (v2025.03.14) |
| Apr 13, 2025 | 3.91% (0.03905) | 87.28th | v4 (v2025.03.14) |
| Apr 12, 2025 | 2.13% (0.02131) | 82.74th | v4 (v2025.03.14) |
| Apr 5, 2025 | 3.91% (0.03905) | 87.27th | v4 (v2025.03.14) |
| Apr 4, 2025 | 2.13% (0.02131) | 82.70th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.91% (0.03905) | 87.21th | v4 (v2025.03.14) |
| Mar 29, 2025 | 58.25% (0.58247) | 97.40th | v4 (v2025.03.14) |
| Mar 28, 2025 | 3.91% (0.03905) | 87.23th | v4 (v2025.03.14) |
| Mar 27, 2025 | 58.25% (0.58247) | 97.90th | v4 (v2025.03.14) |
| Mar 25, 2025 | 22.92% (0.22922) | 95.38th | v4 (v2025.03.14) |
| Mar 24, 2025 | 16.34% (0.16344) | 94.28th | v4 (v2025.03.14) |
| Mar 21, 2025 | 22.92% (0.22922) | 95.44th | v4 (v2025.03.14) |
| Mar 20, 2025 | 16.34% (0.16344) | 94.35th | v4 (v2025.03.14) |
| Mar 19, 2025 | 58.25% (0.58247) | 97.94th | v4 (v2025.03.14) |
| Mar 18, 2025 | 16.34% (0.16344) | 94.39th | v4 (v2025.03.14) |
| Mar 17, 2025 | 22.92% (0.22922) | 95.44th | v4 (v2025.03.14) |
| Dec 17, 2024 | 0.62% (0.00624) | 78.73th | v3 (v2023.03.01) |
| May 12, 2024 | 2.12% (0.02117) | 89.11th | v3 (v2023.03.01) |
| Jun 7, 2023 | 2.97% (0.02971) | 89.44th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.92% (0.02921) | 89.23th | v3 (v2023.03.01) |
| Mar 6, 2023 | 28.45% (0.28446) | 97.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 28.45% (0.28446) | 96.04th | v2 (v2022.01.01) |
Weaknesses (1)
References (8)
- http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://secunia.com/advisories/55173 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.openwall.com/lists/oss-security/2013/10/16/11 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/62993 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://matt.ucc.asn.au/dropbear/CHANGES x_refsource_CONFIRMVendor Advisory
- https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a x_refsource_CONFIRMPatchThird Party Advisory
- https://support.citrix.com/article/CTX216642 x_refsource_CONFIRMThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html | vendor-advisoryx_refsource_SUSEThird Party Advisory | |
| http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html | vendor-advisoryx_refsource_SUSEThird Party Advisory | |
| http://secunia.com/advisories/55173 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://www.openwall.com/lists/oss-security/2013/10/16/11 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.securityfocus.com/bid/62993 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://matt.ucc.asn.au/dropbear/CHANGES | x_refsource_CONFIRMVendor Advisory | |
| https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://support.citrix.com/article/CTX216642 | x_refsource_CONFIRMThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Oct 25, 2013
Updated Aug 6, 2024
Reserved Jun 12, 2013
Link CVE-2013-4434
CISA Vulnrichment
Updated n/a