{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-6210 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2016-6210 is a medium-severity vulnerability in OpenSSH, published on 13 Feb 2017. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2016-6210 and fix it if it is affected.\n\nWhat it is: CVE-2016-6210 is a medium-severity vulnerability in OpenSSH, published on 13 Feb 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-6210 exists.\n\nAffected product: OpenSSH. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2016-6210/ (Markdown: https://insights.sbomify.com/CVE-2016-6210/index.md)","id":"CVE-2016-6210","markdown":"https://insights.sbomify.com/CVE-2016-6210/index.md","name":"CVE-2016-6210","record":{"aliases":["ALPINE-CVE-2016-6210","DEBIAN-CVE-2016-6210","DLA-578-1","DSA-3626-1","GHSA-f525-65h3-3qjh","RHSA-2017:2563","UBUNTU-CVE-2016-6210"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"OpenSSH server","requires_auth":"none","summary":"Remote attackers can enumerate valid usernames by exploiting timing differences in password hashing when specific algorithms are used.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"openssh","vendor":"openbsd"}],"cvss":{"score":5.9,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"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.","ecosystems":["Red Hat:enterprise_linux:6::client","Red Hat:enterprise_linux:6::computenode","Red Hat:enterprise_linux:6::server","Red Hat:enterprise_linux:6::workstation"],"exploits":{"exploitdb":2,"first_seen":"2016-07-18","github_poc":7,"max_poc_stars":3,"metasploit":1,"nuclei":0,"refs":[{"date":"2019-08-25T07:23:44Z","kind":"github_poc","ref":"https://github.com/justlce/CVE-2016-6210-Exploit","stars":3,"title":"OpenSSH Username Enumeration - CVE-2016-6210"},{"date":"2023-03-19T19:16:36Z","kind":"github_poc","ref":"https://github.com/goomdan/CVE-2016-6210-exploit","stars":1,"title":"Custom exploit written for enumerating usernames as per CVE-2016-6210"},{"date":"2025-03-14T21:50:49Z","kind":"github_poc","ref":"https://github.com/wabiyagi/CVE-2016-6210","stars":1,"title":"User name enumeration against SSH daemons affected by CVE-2016-6210."},{"date":"2016-07-18","kind":"exploitdb","ref":"40113","stars":null,"title":"OpenSSHd 7.2p2 - Username Enumeration"},{"date":"2016-07-20","kind":"exploitdb","ref":"40136","stars":null,"title":"OpenSSH 7.2p2 - Username Enumeration"},{"date":"2023-09-01T20:43:25Z","kind":"github_poc","ref":"https://github.com/samh4cks/CVE-2016-6210-OpenSSH-User-Enumeration","stars":0,"title":null},{"date":"2025-04-12T02:51:08Z","kind":"github_poc","ref":"https://github.com/nicoleman0/CVE-2016-6210-OpenSSHd-7.2p2","stars":0,"title":null},{"date":"2025-07-17T07:47:19Z","kind":"github_poc","ref":"https://github.com/KiPhuong/cve-2016-6210","stars":0,"title":"PoC of cve-2016-6210"}],"tier":"weaponised"},"has_fix":true,"headline":"Information disclosure in n/a","id":"CVE-2016-6210","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"openbsd:openssh","products":["openbsd:openssh"],"type":"information_disclosure","year":"2016"},"n_packages":28,"n_references":12,"next":{"headline":"Drupal Saving user accounts can sometimes grant the user all roles","id":"CVE-2016-6211"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:6::client","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh","purl":"pkg:rpm/redhat/openssh","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::client","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-askpass","purl":"pkg:rpm/redhat/openssh-askpass","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::client","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-clients","purl":"pkg:rpm/redhat/openssh-clients","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::client","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-debuginfo","purl":"pkg:rpm/redhat/openssh-debuginfo","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::client","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-ldap","purl":"pkg:rpm/redhat/openssh-ldap","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::client","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-server","purl":"pkg:rpm/redhat/openssh-server","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::client","fixed":["0:0.9.3-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"pam_ssh_agent_auth","purl":"pkg:rpm/redhat/pam_ssh_agent_auth","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::computenode","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh","purl":"pkg:rpm/redhat/openssh","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::computenode","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-askpass","purl":"pkg:rpm/redhat/openssh-askpass","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::computenode","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-clients","purl":"pkg:rpm/redhat/openssh-clients","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::computenode","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-debuginfo","purl":"pkg:rpm/redhat/openssh-debuginfo","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::computenode","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-ldap","purl":"pkg:rpm/redhat/openssh-ldap","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::computenode","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-server","purl":"pkg:rpm/redhat/openssh-server","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::computenode","fixed":["0:0.9.3-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"pam_ssh_agent_auth","purl":"pkg:rpm/redhat/pam_ssh_agent_auth","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::server","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh","purl":"pkg:rpm/redhat/openssh","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::server","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-askpass","purl":"pkg:rpm/redhat/openssh-askpass","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::server","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-clients","purl":"pkg:rpm/redhat/openssh-clients","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::server","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-debuginfo","purl":"pkg:rpm/redhat/openssh-debuginfo","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::server","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-ldap","purl":"pkg:rpm/redhat/openssh-ldap","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::server","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-server","purl":"pkg:rpm/redhat/openssh-server","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::server","fixed":["0:0.9.3-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"pam_ssh_agent_auth","purl":"pkg:rpm/redhat/pam_ssh_agent_auth","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::workstation","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh","purl":"pkg:rpm/redhat/openssh","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::workstation","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-askpass","purl":"pkg:rpm/redhat/openssh-askpass","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::workstation","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-clients","purl":"pkg:rpm/redhat/openssh-clients","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::workstation","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-debuginfo","purl":"pkg:rpm/redhat/openssh-debuginfo","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::workstation","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-ldap","purl":"pkg:rpm/redhat/openssh-ldap","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::workstation","fixed":["0:5.3p1-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"openssh-server","purl":"pkg:rpm/redhat/openssh-server","source":"RHSA-2017:2563"},{"ecosystem":"Red Hat:enterprise_linux:6::workstation","fixed":["0:0.9.3-123.el6_9"],"introduced":["0"],"last_affected":[],"package":"pam_ssh_agent_auth","purl":"pkg:rpm/redhat/pam_ssh_agent_auth","source":"RHSA-2017:2563"}],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2016-6209"},"products":["n/a"],"published":"2017-02-13","related":[{"cvss_score":10,"headline":"Auth bypass in n/a","id":"CVE-2003-0786","kev_date_added":null,"published":"2003-09-25"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2003-0693","kev_date_added":null,"published":"2003-09-17"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2002-0640","kev_date_added":null,"published":"2003-04-02"},{"cvss_score":10,"headline":"Integer overflow in n/a","id":"CVE-2001-0144","kev_date_added":null,"published":"2001-05-07"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2000-0999","kev_date_added":null,"published":"2000-11-29"},{"cvss_score":10,"headline":"Privilege escalation in n/a","id":"CVE-2000-0525","kev_date_added":null,"published":"2000-10-13"},{"cvss_score":9.8,"headline":"Auth bypass in n/a","id":"CVE-2010-4478","kev_date_added":null,"published":"2010-12-06"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-29","vendors":["n/a"]},"summary":"Remote attackers can enumerate valid usernames by exploiting timing differences in password hashing when specific algorithms are used.","url":"https://insights.sbomify.com/CVE-2016-6210/"}