USN-4076-1

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USN-4076-1

Summary: linux, linux-aws, linux-kvm, linux-raspi2 vulnerabilities

Details: It was discovered that a race condition existed in the Serial Attached SCSI (SAS) implementation in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2018-20836) It was discovered that the ext4 file system implementation in the Linux kernel did not properly zero out memory in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2019-11833) It was discovered that the Bluetooth Human Interface Device Protocol (HIDP) implementation in the Linux kernel did not properly verify strings were NULL terminated in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2019-11884) It was discovered that the Linux kernel on ARM processors allowed a tracing process to modify a syscall after a seccomp decision had been made on that syscall. A local attacker could possibly use this to bypass seccomp restrictions. (CVE-2019-2054) Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux kernel did not properly prevent remote firmware events from being processed for USB Wifi devices. A physically proximate attacker could use this to send firmware events to the device. (CVE-2019-9503) It was discovered that an integer overflow existed in the Freescale (PowerPC) hypervisor manager in the Linux kernel. A local attacker with write access to /dev/fsl-hv could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-10142)

References: https://ubuntu.com/security/notices/USN-4076-1, https://ubuntu.com/security/CVE-2018-20836, https://ubuntu.com/security/CVE-2019-2054, https://ubuntu.com/security/CVE-2019-9503, https://ubuntu.com/security/CVE-2019-10142, https://ubuntu.com/security/CVE-2019-11833, https://ubuntu.com/security/CVE-2019-11884