Ubuntu PT Chown Privilege Escalation

Source: http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/ Introduction Problem description: With Ubuntu Wily and earlier, /usr/lib/ptchown was used to change ownership of slave pts devices in /dev/pts to the same uid holding the master file descriptor for the slave...

Ubuntu 15.10 - USERNS Overlayfs Over Fuse Privilege Escalation Vulnerability

Exploit for linux platform in category local exploits Source: http://www.halfdog.net/Security/2016/OverlayfsOverFusePrivilegeEscalation/ Introduction Problem description: On Ubuntu Wily it is possible to place an USERNS overlayfs mount over a fuse mount. The fuse filesystem may contain SUID...

Ubuntu 14.0415.10 - User Namespace Overlayfs Xattr SetGID Privilege Escalation

Ubuntu 14.0415.10 - User Namespace Overlayfs Xattr SetGID Privilege Escalation Source: http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ Introduction Problem description: Linux user namespace allows to mount file systems as normal user, including the...