SB2017120208 - OpenSUSE Linux update for xen
Published: December 2, 2017
Security Bulletin ID
SB2017120208
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) 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.
2) Race condition (CVE-ID: CVE-2017-15597)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows an adjacent administrative attacker to cause DoS condition on the target system.
The weakness exists due to a race condition in certain grant copy operations. A local attacker can trigger a memory corruption error in the hypervisor and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
Remediation
Install update from vendor's website.