A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that tra…

XSS exists in Flexense DupScout Enterprise from v10.0.18 to v10.7.

XSS exists in Flexense VX Search Enterprise from v10.1.12 to v10.7.

XSS exists in Flexense DiskPulse Enterprise from v10.4 to v10.7.

An XSS in Flexense SyncBreeze affects all versions (tested from SyncBreeze Enterprise from v10.1 to v10.7).

XSS exists in Flexense DiskSorter Enterprise from v9.5.12 to v10.7.

XSS exists in Flexense DiskSavvy Enterprise from v10.4 to v10.7.

Flexense DiskBoss Enterprise v7.4.28 to v9.1.16 has XSS.

An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users (in certain configurations) to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot.

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754.