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CVE-2016-6515

Good to know:

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Date: August 7, 2016

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.

Language: C

Severity Score

Related Resources (18)

https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-676336.pdf
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03779en_us
https://security.netapp.com/advisory/ntap-20171130-0003/
http://www.securityfocus.com/bid/92212
https://access.redhat.com/security/cve/CVE-2016-6515
http://packetstormsecurity.com/files/140070/OpenSSH-7.2-Denial-Of-Service.html
https://access.redhat.com/errata/RHSA-2017:2029
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X2L6RW34VFNXYNVVN2CN73YAGJ5VMTFU/
http://www.securitytracker.com/id/1036487
https://www.exploit-db.com/exploits/40888/
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:06.openssh.asc
https://github.com/openssh/openssh-portable/commit/fcd135c9df440bcd2d5870405ad3311743d78d97
http://openwall.com/lists/oss-security/2016/08/01/2
https://nvd.nist.gov/vuln/detail/CVE-2016-6515
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
https://www.mend.io/vulnerability-database/CVE-2016-6515

Severity Score

Weakness Type (CWE)

Input Validation

CWE-20

Top Fix

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CVSS v3.1

Base Score:
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 v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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