"A bug exists in the channel code of OpenSSH versions 2.0 - 3.0.2 Users with an existing user account can abuse this bug to gain root privileges. Exploitability without an existing user account has not been proven but is not considered impossible. A malicious ssh server could also use this bug to exploit a connecting vulnerable client.". . .. "A bug exists in the channel code of OpenSSH versions 2.0 - 3.0.2 Users with an existing user account can abuse this bug to gain root privileges. Exploitability without an existing user account has not been proven but is not considered impossible. A malicious ssh server could also use this bug to exploit a connecting vulnerable client." Many vendors have already issued vulnerabilities. Check out the LinuxSecurity Advisory page for a complete listing. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - ----------------------------------------------------------------------------- Pine Internet Security Advisory - ----------------------------------------------------------------------------- Advisory ID : PINE-CERT-20020301 Authors : Joost Pol Issue date : 2002-03-07 Application : OpenSSH Version(s) : All versions between 2.0 and 3.0.2 Platforms : multiple Vendor informed : 20020304 Availability : https://defion.security/nl/blog/ - ----------------------------------------------------------------------------- Synopsis A bug exists in the channel code of OpenSSH versions 2.0 - 3.0.2 Users with an existing user account can abuse this bug to gain root privileges. Exploitability without an existing user account has not been proven but is not considered impossible. A malicious ssh server could also use this bug to exploit a connecting vulnerable client. Impact HIGH: Existing users will gain root privileges. Description Simple off by one error. Patch included. Solution The OpenSSH project will shortly release version 3.1. Upgrading to this version is highly recommended. This version will be made available at https://www.openssh.org/ The FreeBSD port of OpenSSH has been updated to reflect the patches as supplied in this document. OpenSSH CVS has been updated, see \ channels.c.diff?r1=1.170&r2=1.171 Or apply the attached patch as provided by PINE Internet: https://defion.security/nl/blog/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iEYEARECAAYFAjyHaKkACgkQDNrSylhGGb3p2ACfXZu3WShzGT4Mp/LgwA6AZStu rtkAn3O83WzyNijdJ9+9OwLJxUcVj4Ld =j+Hz -----END PGP SIGNATURE----- . Mitigating a security vulnerability in OpenSSL releases 1.0 to 1.1.1j, which affects data encryption protocols and overall system safety.. OpenSSH Privilege Escalation, Security Advisory OpenSSH, User Access Control Flaw. . LinuxSecurity.com Team
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