SB2017061210 - Denial of service in QEMU
Published: June 12, 2017 Updated: May 7, 2018
Security Bulletin ID
SB2017061210
CSH Severity
Low
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 vulnerabilities.
1) Null pointer dereference (CVE-ID: CVE-2017-9524)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.
The weakness exists due to NULL pointer dereference in Network Block Device(NBD) Server support during a failed negotiation of a client. A remote attacker can cause the affected server to crash.
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: 8.7 [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]
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.
Remediation
Install update from vendor's website.