CVE-2016-6515

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.

CVSS v3.0 7.5 HIGH
CVSS v2.0 7.8 HIGH

7.5^/10

CVSS v3.0 : HIGH

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

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

7.8^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:C

Exploitability : 10.0 / Impact : 6.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/openssh/openssh-portable/commit/fcd135c9df440bcd2d5870405ad3311743d78d97	Issue Tracking Patch
http://openwall.com/lists/oss-security/2016/08/01/2	Third Party Advisory VDB Entry
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X2L6RW34VFNXYNVVN2CN73YAGJ5VMTFU/	Third Party Advisory
http://www.securityfocus.com/bid/92212
https://www.exploit-db.com/exploits/40888/
http://packetstormsecurity.com/files/140070/OpenSSH-7.2-Denial-Of-Service.html
http://www.securitytracker.com/id/1036487
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:06.openssh.asc
https://security.netapp.com/advisory/ntap-20171130-0003/
https://access.redhat.com/errata/RHSA-2017:2029
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03779en_us
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
https://cert-portal.siemens.com/productcert/pdf/ssa-676336.pdf

Configurations

Configuration 1 (hide)

cpe:2.3:a:openbsd:openssh:*:p2:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:*

Information

Published : 2016-08-07 21:59

Updated : 2021-09-14 13:15

NVD link : CVE-2016-6515

Mitre link : CVE-2016-6515

JSON object : View

Products Affected

fedoraproject

fedora

openbsd

openssh

CWE

CWE-20

Improper Input Validation

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