Allocation of Resources Without Limits or Throttling Affecting openssh-server-sysvinit package, versions <0:7.4p1-11.el7
Threat Intelligence
Snyk has a published code exploit for this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Allocation of Resources Without Limits or Throttling vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-CENTOS7-OPENSSHSERVERSYSVINIT-2087449
- published26 Jul 2021
- disclosed21 Jul 2016
Introduced: 21 Jul 2016
CVE-2016-6515 (opens in a new tab)How to fix?
Upgrade Centos:7 openssh-server-sysvinit to version 0:7.4p1-11.el7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssh-server-sysvinit package and not the openssh-server-sysvinit package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
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.
References
- http://www.securityfocus.com/bid/92212
- https://cert-portal.siemens.com/productcert/pdf/ssa-676336.pdf
- https://github.com/openssh/openssh-portable/commit/fcd135c9df440bcd2d5870405ad3311743d78d97
- https://security.netapp.com/advisory/ntap-20171130-0003/
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03779en_us
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- https://access.redhat.com/security/cve/CVE-2016-6515
- https://www.exploit-db.com/exploits/40888/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X2L6RW34VFNXYNVVN2CN73YAGJ5VMTFU/
- https://security.FreeBSD.org/advisories/FreeBSD-SA-17:06.openssh.asc
- http://packetstormsecurity.com/files/140070/OpenSSH-7.2-Denial-Of-Service.html
- http://openwall.com/lists/oss-security/2016/08/01/2
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
- https://access.redhat.com/errata/RHSA-2017:2029
- http://www.securitytracker.com/id/1036487
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X2L6RW34VFNXYNVVN2CN73YAGJ5VMTFU/
- https://www.exploit-db.com/exploits/40888