![]() When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contents and name of a file on the server and b) the server is configured to use the PersistenceManager with a FileStore and c) the PersistenceManager is configured with sessionAttributeValueClassNameFilter=null (the default unless a SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized and d) the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has control over then, using a specifically crafted request, the attacker will be able to trigger remote code execution via deserialization of the file under their control. Note that both the previously published prerequisites for CVE-2020-9484 and the previously published mitigations for CVE-2020-9484 also apply to this issue. An attacker is able to control the contents and name of a file on the server and b) the server is configured to use the PersistenceManager with a FileStore and c) the PersistenceManager is configured with sessionAttributeValueClassNameFilter=null (the default unless a SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized and d) the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has control over then, using a specifically crafted request, the attacker will be able to trigger remote code execution via deserialization of the file under their control. It is, therefore, affected by a remote code execution vulnerability via deserialization. The fix for CVE-2020-9484 was incomplete. It is, therefore, affected by multiple vulnerabilities as referenced in the Fixed_in_Apache_Tomcat_7.0.108 advisory: The version of Tomcat installed on the remote host is prior to 7.0.108. The remote Apache Tomcat server is affected by a remote code execution vulnerability Description Required KB Items : installed_sw/Apache Tomcat Why your exploit completed, but no session was created?Äependencies: apache_tomcat_nix_installed.nbin, tomcat_error_version.nasl, tomcat_win_installed.nbin.Nessus CSV Parser and Extractor (yanp.sh).Default Password Scanner (default-http-login-hunter.sh).SSH Brute Force Attack Tool using PuTTY / Plink (ssh-putty-brute.ps1).SMB Brute Force Attack Tool in PowerShell (SMBLogin.ps1).Windows Local Admin Brute Force Attack Tool (LocalBrute.ps1).Active Directory Brute Force Attack Tool in PowerShell (ADLogin.ps1).Solution for SSH Unable to Negotiate Errors.Spaces in Passwords – Good or a Bad Idea?.Security Operations Center: Challenges of SOC Teams. ![]() SSH Sniffing (SSH Spying) Methods and Defense.Detecting Network Attacks with Wireshark.Solving Problems with Office 365 Email from GoDaddy.Exploits, Vulnerabilities and Payloads: Practical Introduction. ![]()
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