jmestwa-coder
3a6059e9c0
The binary catalog reader trusted two values straight from a (possibly hostile) database: open_mmap() summed header_size + n_items * catalog_item_size in uint64 with no overflow check, and find_id() added the matched item's offset to the map base with no upper bound. Reachable through sd_journal_get_catalog() with $SYSTEMD_CATALOG set, this let catalog_get()/catalog_list() strdup() a string starting outside the mapping. Guard the size math with MUL_SAFE/INC_SAFE and reject item offsets that fall outside the file.
System and Service Manager
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