pax_decode_header in sparse.c in GNU Tar before 1.32 had a NULL pointer dereference when parsing certain archives that have malformed extended headers. Reference: https://bugs.launchpad.net/ubuntu/+source/tar/+bug/1810241 Upstream commit: http://git.savannah.gnu.org/cgit/tar.git/commit/?id=cb07844454d8cc9fb21f53ace75975f91185a120
Created tar tracking bugs for this issue: Affects: fedora-all [bug 1691765]
Function pax_decode_header() in sparse.c does not check if there is a next block before using it, thus some malformed tar files could cause an application crash.