Linux Heap TCache House of Spirit
In this
paper, I introduce the reader to a heap metadata corruption against the latest version
of the glibc allocator, ptmalloc. In the TCache House of Spirit, an attacker
passes a pointer to a fake chunk header to the free API. This chunk can be of
almost arbitrary size. The allocator will subsequently insert this fake chunk
into a tcache freelist. The next malloc of the appropriate size will return the
fake chunk which may overlap data that may be of benefit to the attacker.
Linux Heap TCache House of Spirit.PDF
Linux Heap TCache House of Spirit.PDF