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Vulnerability record · CVE-2017-2659 · published 21 March 2019

CVE-2017-2659: Dropbear ssh project dropbear ssh error message information leak vulnerability

DDropbear Ssh Project · Dropbear Ssh

It was found that dropbear before version 2013.59 with GSSAPI leaks whether given username is valid or invalid. When an invalid username is given, the GSSAPI authentication failure was incorrectly counted towards the maximum allowed number of password attempts.

7.5 CVSS 3.0 High EPSS 1.5% · top 26.7% CWE-209 · Error message information leakCWE-287 · Improper authentication
7.5CVSS 3.0 base score, v2 5.0
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

It was found that dropbear before version 2013.59 with GSSAPI leaks whether given username is valid or invalid. When an invalid username is given, the GSSAPI authentication failure was incorrectly counted towards the maximum allowed number of password attempts.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2659 Issue TrackingPatchThird Party Advisory
https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a#l1.86 PatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2659 Issue TrackingPatchThird Party Advisory
https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a#l1.86 PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2016-7406Dropbear ssh project dropbear ssh improper input validation vulnerabilityFormat string vulnerability in Dropbear SSH before 2016.74 allows remote attackers to execute arbitrary code via format string specifiers in the (1) …EPSS 10%9.8CVE-2016-7407Dropbear ssh project dropbear ssh improper input validation vulnerabilityThe dropbearconvert command in Dropbear SSH before 2016.74 allows attackers to execute arbitrary code via a crafted OpenSSH key file.EPSS 5.7%8.8CVE-2017-9078Dropbear ssh project dropbear ssh double free vulnerabilityThe server in Dropbear before 2017.75 might allow post-authentication root remote code execution because of a double free in cleanup of TCP listeners…EPSS 5.5%8.8CVE-2016-7408Dropbear ssh project dropbear ssh improper access control vulnerabilityThe dbclient in Dropbear SSH before 2016.74 allows remote attackers to execute arbitrary code via a crafted (1) -m or (2) -c argument.EPSS 4.2%8.1CVE-2020-36254Dropbear ssh project dropbear ssh vulnerabilityscp.c in Dropbear before 2020.79 mishandles the filename of . or an empty filename, a related issue to CVE-2018-20685.EPSS 1.8%7.5CVE-2021-36369Dropbear ssh project dropbear ssh improper authentication vulnerabilityAn issue was discovered in Dropbear through 2020.81. Due to a non-RFC-compliant check of the available authentication methods in the client-side SSH …EPSS 1.5%7.5CVE-2007-1099Dropbear ssh project dropbear ssh vulnerabilitydbclient in Dropbear SSH client before 0.49 does not sufficiently warn the user when it detects a hostkey mismatch, which might allow remote attacker…EPSS 2.2%7.5CVE-2004-2486Dropbear ssh project dropbear ssh vulnerabilityThe DSS verification code in Dropbear SSH Server before 0.43 frees uninitialized variables, which might allow remote attackers to gain access.EPSS 3.0%

Source: NIST National Vulnerability Database (record CVE-2017-2659), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.