CVE-2016-6515

· N/AModified

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CVSS v3.1

N/A

EPSS

58.57%

Published

Aug 7, 2016

Modified

May 6, 2026

Public PoC / Exploit (2)

All weaponized →

TrickestTrickest PoC index Exploit-DBOpenSSH 7.2 - Denial of Service

Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

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.

Weaknesses (CWE)

CWE-20

Affected Products (2)

openbsd · opensshvulnerable

fedoraproject · fedoravulnerable

References (20)

http://openwall.com/lists/oss-security/2016/08/01/2

Third Party AdvisoryVDB Entry

http://packetstormsecurity.com/files/140070/OpenSSH-7.2-Denial-Of-Service.html

http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html

http://www.securityfocus.com/bid/92212

http://www.securitytracker.com/id/1036487

https://access.redhat.com/errata/RHSA-2017:2029

https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

https://cert-portal.siemens.com/productcert/pdf/ssa-676336.pdf

https://github.com/openssh/openssh-portable/commit/fcd135c9df440bcd2d5870405ad3311743d78d97

Issue TrackingPatch

https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X2L6RW34VFNXYNVVN2CN73YAGJ5VMTFU/

https://security.FreeBSD.org/advisories/FreeBSD-SA-17:06.openssh.asc

https://security.netapp.com/advisory/ntap-20171130-0003/

https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03779en_us

https://www.exploit-db.com/exploits/40888/