Microsoft SMBv3 contains a vulnerability in the handling of compression, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. This vulnerability is being referred to as \"SMBGhost and CoronaBlue.\"
\r\n\r\n### Description ###\r\nMicrosoft Server Message Block 3.1.1 (SMBv3) contains a vulnerability in the way that it handles connections that use compression. This vulnerability may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. It has been reported that this vulnerability is \"wormable.\"
\r\n\r\n### Impact ###\r\nBy connecting to a vulnerable Windows machine using SMBv3, or by causing a vulnerable Windows system to initiate a client connection to a SMBv3 server, a remote, unauthenticated attacker may be able to execute arbitrary code with SYSTEM privileges on a vulnerable system.
\r\n\r\n### Solution ###\r\nApply an update
This issue has been addressed in the Microsoft update for CVE-2020-0796. Please also consider the following workarounds:
Disable SMBv3 compression
According to Microsoft Security Advisory ADV200005 :
This document was written by Will Dormann.
","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/872016"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796","summary":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/adv200005","summary":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/adv200005"},{"url":"https://github.com/chompie1337/SMBGhost_RCE_PoC","summary":"https://github.com/chompie1337/SMBGhost_RCE_PoC"}],"title":"Microsoft SMBv3 compression remote code execution vulnerability","tracking":{"current_release_date":"2020-06-04T21:26:29+00:00","generator":{"engine":{"name":"VINCE","version":"3.0.35"}},"id":"VU#872016","initial_release_date":"2020-03-10 00:00:00+00:00","revision_history":[{"date":"2020-06-04T21:26:29+00:00","number":"1.20200604212629.28","summary":"Released on 2020-06-04T21:26:29+00:00"}],"status":"final","version":"1.20200604212629.28"}},"vulnerabilities":[{"title":"A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.","notes":[{"category":"summary","text":"A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'."}],"cve":"CVE-2020-0796","ids":[{"system_name":"CERT/CC V Identifier ","text":"VU#872016"}],"product_status":{"known_affected":["CSAFPID-a829a880-39d8-11f1-8422-122e2785dc9f"]}}],"product_tree":{"branches":[{"category":"vendor","name":"Microsoft","product":{"name":"Microsoft Products","product_id":"CSAFPID-a829a880-39d8-11f1-8422-122e2785dc9f"}}]}}