The build package before 20171128 did not check directory names during extraction of build results that allowed untrusted builds to write outside of the target system,allowing escape out of buildroots.

The build package before 20171128 did not check directory names during extraction of build results that allowed untrusted builds to write outside of the target system,allowing escape out of buildroots.

Security update for build

Fixing security issues on OBS toolchain

Affected: Ubuntu:16.04:LTS: obs-build, Ubuntu:18.04:LTS: obs-build

The build package before 20171128 did not check directory names during extraction of build results that allowed untrusted builds to write outside of the target system,allowing escape out of buildroots.