SB2017121453 - Red Hat update for qemu-kvm-rhev

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Main Vulnerability Database SB2017121453

SB2017121453 - Red Hat update for qemu-kvm-rhev

Published: December 14, 2017

Security Bulletin ID SB2017121453
CSH Severity
High
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 20% Low 80%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 vulnerabilities.


1) Denial of service (CVE-ID: CVE-2017-7539)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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)

CWE-ID: CWE-19 - Data Handling

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


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)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


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)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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.

References