SB2017060234 - Multiple vulnerabilities in QEMU
Published: September 6, 2017 Updated: August 7, 2018
Security Bulletin ID
SB2017060234
Severity
High
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 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) Stack-based buffer overflow (CVE-ID: CVE-2017-15118)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists in the network block device (NBD) server implementation due to stack-based buffer overflow when handling malicious input. A remote unauthenticated attacker can send a large export-name request, trigger memory corruption and cause the service to crash or execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.