CVE-2018-19974 In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack). https://github.com/VirusTotal/yara/issues/999 CVE-2018-19975 In YARA 3.8.1, bytecode in a specially crafted compiled rule can read data from any arbitrary address in memory, in libyara/exec.c. Specifically, OP_COUNT can read a DWORD. https://github.com/VirusTotal/yara/issues/999 CVE-2018-19976 In YARA 3.8.1, bytecode in a specially crafted compiled rule is exposed to information about its environment, in libyara/exec.c. This is a consequence of the design of the YARA virtual machine. https://bnbdr.github.io/posts/extracheese/ https://github.com/bnbdr/swisscheese/ https://github.com/VirusTotal/yara/issues/999
Created yara tracking bugs for this issue: Affects: epel-all [bug 1660399] Affects: fedora-all [bug 1660398]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.