National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2016-6515 Detail

Description

The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.

Source:  MITRE      Last Modified:  08/07/2016

Quick Info

CVE Dictionary Entry:
CVE-2016-6515
Original release date:
08/07/2016
Last revised:
01/04/2018
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
7.5 High
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (legend)
Impact Score:
3.6
Exploitability Score:
3.9
CVSS Version 3 Metrics:
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High
CVSS Severity (version 2.0):
CVSS v2 Base Score:
7.8 HIGH
Vector:
(AV:N/AC:L/Au:N/C:N/I:N/A:C) (legend)
Impact Subscore:
6.9
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector:
Network exploitable
Access Complexity:
Low
Authentication:
Not required to exploit
Impact Type:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
http://openwall.com/lists/oss-security/2016/08/01/2 Third Party Advisory; VDB Entry External Source MLIST [oss-security] 20160801 Announce: OpenSSH 7.3 released
http://packetstormsecurity.com/files/140070/OpenSSH-7.2-Denial-Of-Service.html External Source MISC http://packetstormsecurity.com/files/140070/OpenSSH-7.2-Denial-Of-Service.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html External Source CONFIRM http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.securityfocus.com/bid/92212 External Source BID 92212
http://www.securitytracker.com/id/1036487 External Source SECTRACK 1036487
https://access.redhat.com/errata/RHSA-2017:2029 External Source REDHAT RHSA-2017:2029
https://github.com/openssh/openssh-portable/commit/fcd135c9df440bcd2d5870405ad3311743d78d97 Issue Tracking; Patch External Source CONFIRM https://github.com/openssh/openssh-portable/commit/fcd135c9df440bcd2d5870405ad3311743d78d97
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X2L6RW34VFNXYNVVN2CN73YAGJ5VMTFU/ Third Party Advisory External Source FEDORA FEDORA-2016-4a3debc3a6
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:06.openssh.asc External Source FREEBSD FreeBSD-SA-17:06
https://security.netapp.com/advisory/ntap-20171130-0003/ External Source CONFIRM https://security.netapp.com/advisory/ntap-20171130-0003/
https://www.exploit-db.com/exploits/40888/ External Source EXPLOIT-DB 40888

Technical Details

Vulnerability Type (View All)

Change History 11 change records found - show changes