CVE-2016-6210

Summary

sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided.

Affected Software

Weaknesses

• n/a

ADP Enrichment

CVE Program Container

Additional References

• https://access.redhat.com/errata/RHSA-2017:2563
• http://www.securitytracker.com/id/1036319
• http://seclists.org/fulldisclosure/2016/Jul/51
• http://www.debian.org/security/2016/dsa-3626
• https://www.exploit-db.com/exploits/40136/
• https://www.exploit-db.com/exploits/40113/
• https://www.openssh.com/txt/release-7.3
• https://security.gentoo.org/glsa/201612-18
• https://access.redhat.com/errata/RHSA-2017:2029
• http://www.securityfocus.com/bid/91812
• https://security.netapp.com/advisory/ntap-20190206-0001/
• https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

References

• https://access.redhat.com/errata/RHSA-2017:2563
• http://www.securitytracker.com/id/1036319
• http://seclists.org/fulldisclosure/2016/Jul/51
• http://www.debian.org/security/2016/dsa-3626
• https://www.exploit-db.com/exploits/40136/
• https://www.exploit-db.com/exploits/40113/
• https://www.openssh.com/txt/release-7.3
• https://security.gentoo.org/glsa/201612-18
• https://access.redhat.com/errata/RHSA-2017:2029
• http://www.securityfocus.com/bid/91812
• https://security.netapp.com/advisory/ntap-20190206-0001/
• https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

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