Mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure.
Month: February 2020
ASA-2019-00657 – Linux kernel: Use-after-free vulnerability when deleting a file from a recently unmounted specially crafted ext4 filesystem
A flaw was found in the Linux kernel's ext4_unlink function. An attacker could corrupt memory or escalate privileges when deleting a file from a recently unmounted specially crafted ext4 filesystem, including local, USB, and iSCSI.
ASA-2019-00656 – Intel: Improper conditions check in voltage settings for some Intel Processors
Improper conditions check in voltage settings for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege and/or information disclosure via local access.
ASA-2019-00655 – Xen: Device quarantine for alternate pci assignment methods
An untrusted domain with access to a physical device can DMA into host memory, leading to privilege escalation.
ASA-2020-00001 – MikroTik WinBox: Path traversal vulnerability in the parameter name from the list of files
MikroTik WinBox before 3.21 is vulnerable to a path traversal issue that allows an attacker to write files anywhere on the system where WinBox has write privileges.