SB2017121452 - Red Hat update for qemu-kvm-rhev
Published: December 14, 2017
Security Bulletin ID
SB2017121452
Severity
High
Patch available
YES
Number of vulnerabilities
5
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Denial of service (CVE-ID: CVE-2017-7539)
The vulnerability allows a remote attacker to cause DoS condition on a targeted system.The weakness exists due to an assertion failure when handling malicious input. A remote attacker can submit a specially crafted data during initial connection negotiation and cause the qemu-nbd server to stop functioning.
Successful exploitation of the vulnerability results in denial of service.
2) Data handling (CVE-ID: CVE-2017-10664)
The vulnerability allows a remote attacker to cause DoS condition on the target system..The weakness exists in qemu-nbd due to it does not ignore SIGPIPE. A remote attacker can cause the service to crash by disconnecting during a server-to-client reply attempt.
3) Out-of-bounds read (CVE-ID: CVE-2017-11334)
The vulnerability allows an adjacent authenticated attacker to cause DoS condition on the target system.The weakness exists due to out-of-bounds read. An adjacent attacker can cause the service to crash by leveraging use of qemu_map_ram_ptr to access guest ram block area.
4) Memory corruption (CVE-ID: CVE-2017-14167)
The vulnerability allows an adjacent attacker to execute arbitrary code on the target system.The weakness exists in the load_multiboot function in hw/i386/multiboot.c due to integer overflow. An adjacent attacker can execute arbitrary code via specially crafted multiboot header address values, which trigger an out-of-bounds write.
Successful exploitation of the vulnerability may result in system compromise.
5) Out-of-bounds write (CVE-ID: CVE-2017-15289)
The vulnerability allows an adjacent authenticated attacker to cause DoS condition on the target system.The weakness exists in the mode4and5 write functions in hw/display/cirrus_vga.c due to out-of-bounds write. An adjacent attacker can trigger memory corruption and cause the service to crash via vectors related to dst calculation.
Remediation
Install update from vendor's website.