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Debian OpenSSH Remote SELinux Privilege Elevation Exploit (auth)
[================================================================ Debian OpenSSH Remote SELinux Privilege Elevation Exploit (auth) ================================================================ /* Debian (maybe other derivates |KUDUBUTUNTU|) OpenSSH Remote -=Authenticated=- SELinux Privilege Elevation *** Fedora/RHEL Linux should be tested because it _MAY_ contain the same vulnerability *** in it's OpenSSH patches in a time slice. Latest OpenSSH should not be vulnerable. Older Debian Releases may. **** One vulnerable example is "openssh-SNAP-20070303.tar.gz", currently reachable at **** ftp://ftp.bit.nl/mirror/openssh/openssh-SNAP-20070303.tar.gz **** *** See the "Diff Patch" by Debian: *** + authctxt->role = role ? xstrdup(role) : NULL; **** Where the role is defined in the username after a forward slash '/' **** So anyone can set arbritrary SELinux roles, when OpenSSH is configured with --with-selinux - **** What is a common configuration nowadays. **** For the kids: ***** ssh -lusername:[style]/<arbritrary SELinux role> host ***** ssh -p2222 -lusername:/wishedrole 127.0.0.1 **** ':' means [style] -> [[not relevant]] '/'<arbritrary SELinux role> is the specified SELinux role. **** **** This seams to be a bug jailed in some distros because of legacy code. **** **** 'Exploit' found and delivered by Kingcope. ***//?eliteb0y?// **** CHEERIO ****/ REM blablablaIHAVEPRETTYIDEAHOWSELINUXRUNSWORKSORWHATEVERblablabla # 0day.today [2024-11-14] #