Vulnerability Monitor

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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.

Published

2016-08-07T21:59:09.943

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.5 (HIGH)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

6.9

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	openbsd	openssh	≤ 7.2	Yes
Operating System	fedoraproject	fedora	24	Yes

References

http://openwall.com/lists/oss-security/2016/08/01/2 Third Party Advisory, VDB Entry ([email protected])
http://packetstormsecurity.com/files/140070/OpenSSH-7.2-Denial-Of-Service.html ([email protected])
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html ([email protected])
http://www.securityfocus.com/bid/92212 ([email protected])
http://www.securitytracker.com/id/1036487 ([email protected])
https://access.redhat.com/errata/RHSA-2017:2029 ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-676336.pdf ([email protected])
https://github.com/openssh/openssh-portable/commit/fcd135c9df440bcd2d5870405ad3311743d78d97 Issue Tracking, Patch ([email protected])
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X2L6RW34VFNXYNVVN2CN73YAGJ5VMTFU/ ([email protected])
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:06.openssh.asc ([email protected])
https://security.netapp.com/advisory/ntap-20171130-0003/ ([email protected])
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03779en_us ([email protected])
https://www.exploit-db.com/exploits/40888/ ([email protected])
http://openwall.com/lists/oss-security/2016/08/01/2 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://packetstormsecurity.com/files/140070/OpenSSH-7.2-Denial-Of-Service.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/92212 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1036487 (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2017:2029 (af854a3a-2127-422b-91ae-364da2661108)
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf (af854a3a-2127-422b-91ae-364da2661108)
https://cert-portal.siemens.com/productcert/pdf/ssa-676336.pdf (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/openssh/openssh-portable/commit/fcd135c9df440bcd2d5870405ad3311743d78d97 Issue Tracking, Patch (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X2L6RW34VFNXYNVVN2CN73YAGJ5VMTFU/ (af854a3a-2127-422b-91ae-364da2661108)
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:06.openssh.asc (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20171130-0003/ (af854a3a-2127-422b-91ae-364da2661108)
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03779en_us (af854a3a-2127-422b-91ae-364da2661108)
https://www.exploit-db.com/exploits/40888/ (af854a3a-2127-422b-91ae-364da2661108)