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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 98%
Affected Products (NVD)
VendorProductVersion
openbsdopenssh
𝑥
≤ 7.2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
openssh
bookworm
1:9.2p1-2+deb12u3
fixed
bookworm (security)
1:9.2p1-2+deb12u3
fixed
bullseye
1:8.4p1-5+deb11u3
fixed
bullseye (security)
1:8.4p1-5+deb11u3
fixed
sid
1:9.9p1-3
fixed
trixie
1:9.9p1-3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
openssh
precise
Fixed 1:5.9p1-5ubuntu1.10
released
trusty
Fixed 1:6.6p1-2ubuntu2.8
released
xenial
Fixed 1:7.2p2-4ubuntu2.1
released
yakkety
not-affected
zesty
not-affected
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
openssh
RHEL 7
0:7.4p1-11.el7
fixed
openssh-askpass
RHEL 7
0:7.4p1-11.el7
fixed
openssh-cavs
RHEL 7
0:7.4p1-11.el7
fixed
openssh-clients
RHEL 7
0:7.4p1-11.el7
fixed
openssh-keycat
RHEL 7
0:7.4p1-11.el7
fixed
openssh-ldap
RHEL 7
0:7.4p1-11.el7
fixed
openssh-server
RHEL 7
0:7.4p1-11.el7
fixed
openssh-server-sysvinit
RHEL 7
0:7.4p1-11.el7
fixed
pam
RHEL 7
0:0.10.3-1.11.el7
fixed
Common Weakness Enumeration
References
http://openwall.com/lists/oss-security/2016/08/01/2
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
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/
http://openwall.com/lists/oss-security/2016/08/01/2
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
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/