{"document":{"acknowledgments":[{"urls":["https://kb.cert.org/vuls/id/684820#acknowledgements"]}],"category":"CERT/CC Vulnerability Note","csaf_version":"2.0","notes":[{"category":"summary","text":"A design flaw in the SSH-1 protocol allows a malicious server to establish two concurrent sessions with the same session ID, allowing a man-in-the-middle attack. The client must accept unknown host keys from the malicious server to enable exploitation of this vulnerability.","title":"Summary"},{"category":"legal_disclaimer","text":"THIS DOCUMENT IS PROVIDED ON AN 'AS IS' BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. ","title":"Legal Disclaimer"},{"category":"other","text":"CERT/CC Vulnerability Note is a limited advisory. It primarily identifies vendors impacted by the advisory and not specific products. We only support \"known_affected\" and \"known_not_affected\" status. Please consult the vendor's statements and advisory URL if provided by the vendor for more details ","title":"Limitations of Advisory"}],"publisher":{"category":"coordinator","contact_details":"Email: cert@cert.org, Phone: +1412 268 5800","issuing_authority":"CERT/CC under DHS/CISA https://www.cisa.gov/cybersecurity also see https://kb.cert.org/ ","name":"CERT/CC","namespace":"https://kb.cert.org/"},"references":[{"url":"https://certcc.github.io/certcc_disclosure_policy","summary":"CERT/CC vulnerability disclosure policy"},{"summary":"CERT/CC document released","category":"self","url":"https://kb.cert.org/vuls/id/684820"}],"title":"SSH-1 allows client authentication to be forwarded by a malicious server to another server","tracking":{"current_release_date":"2001-10-29T15:52:04+00:00","generator":{"engine":{"name":"VINCE","version":"3.0.35"}},"id":"VU#684820","initial_release_date":"2001-01-18 00:00:00+00:00","revision_history":[{"date":"2001-10-29T15:52:04+00:00","number":"1.20011029155204.33","summary":"Released on 2001-10-29T15:52:04+00:00"}],"status":"final","version":"1.20011029155204.33"}},"vulnerabilities":[{"notes":[{"category":"general","text":"No vulnerabilities have been defined at this time for this report"}]}]}