SB2018051611 - Debian update for xen
Published: May 16, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Privilege escalation (CVE-ID: CVE-2018-8897)
The vulnerability allows a local attacker to gain elevated privileges on the target system.The vulnerability exists due to improper implementation of Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) on multiple system kernels, which results in an unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS. A local user can execute arbitrary code with elevated privileges.
2) Out-of-bounds write (CVE-ID: CVE-2018-10471)
The vulnerability allows an adjacent attacker to cause DoS condition or execute arbitrary code on the target system.The weakness exists due to an unconditional write attempt of the value zero to an address near 2^64. An adjacent attacker can cause the service to crash or execute arbitrary code via unexpected INT 80 processing.
Successful exploitation of the vulnerability may result in system compromise.
3) Information disclosure (CVE-ID: CVE-2018-10472)
The vulnerability allows an adjacent attacker to obtain potentially sensitive information on the target system.
The weakness exists in certain configurations due to improper information control. An adjacent attacker can 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.
4) Infinite loop (CVE-ID: CVE-2018-10981)
The vulnerability allows an adjacent attacker to cause DoS condition on the target system.The weakness exists due to a failure to reject invalid transitions between states. An adjacent attacker can submit a specially crafted request designed to force the QEMU device model on the system to switch the request between two states, trigger infinite loop and cause the service to crash.
5) Integer overflow (CVE-ID: CVE-2018-10982)
The vulnerability allows an adjacent attacker to cause DoS condition or gain elevated privileges on the target system.The weakness exists due to an array overrun condition that occurs when the High Precision Event Timer (HPET) timer is configured to deliver interrupts in IO-APIC mode. An adjacent attacker who has the HPET timer configured to deliver interrupts in IO-APIC mode can cause the service to crash or gain root privileges.
Remediation
Install update from vendor's website.