Siemens SIMATIC S7-1500 Loop with Unreachable Exit Condition (CVE-2018-20482)

GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service infinite read loop in sparsedumpregion in sparse.c by modifying a file that is supposed to be archived by a different user's process e.g., a system back...