SB2017101903 - Gentoo update for Xen
Published: October 19, 2017
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 vulnerabilities.
1) Privilege escalation (CVE-ID: CVE-2017-10912)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to gain elevated privileges.
The weakness exists due to improper handling of page transfer. A local OS attacker can gain host privileges on the target system.
Successful exploitation of the vulnerability results in privilege escalation.
2) Privilege escalation (CVE-ID: CVE-2017-10913)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a backend attacker to gain frontend privileges.
The weakness exists due to improper mapping of information in certain cases of concurrent unmap calls by the grant-table feature in Xen. A backend attacker can read arbitrary files on the system or gain frontend privileges.
Successful exploitation of the vulnerability results in privilege escalation.
3) Race condition (CVE-ID: CVE-2017-10914)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/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 a local attacker to cause DoS conditions.
The weakness exists due to a race condition in the grant-table feature. A local attacker can trigger double free error and memory consumption and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
4) Privilege escalation (CVE-ID: CVE-2017-10915)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to gain elevated privileges.
The weakness exists due to a race condition when managing page references by the shadow-paging feature.. A local OS attacker can gain Xen privileges on the target system.
Successful exploitation of the vulnerability results in privilege escalation.
5) Privilege escalation (CVE-ID: CVE-2017-10918)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to gain elevated privileges.
The weakness exists due to improper validation of memory allocations during certain P2M operations. A local OS attacker can gain host privileges on the target system.
Successful exploitation of the vulnerability results in privilege escalation.
6) Memory corruption (CVE-ID: CVE-2017-10920)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/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 a local attacker to cause DoS conditions.
The weakness exists due to improper handling of a GNTMAP_device_map and GNTMAP_host_map mapping by the grant-table feature, when followed by only a GNTMAP_host_map unmapping. A local attacker can trigger count mismanagement and memory corruption and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
7) Memory corruption (CVE-ID: CVE-2017-10921)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/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 a local attacker to cause DoS conditions.
The weakness exists due to improper ensuring of sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping by the grant-table feature. A local attacker can trigger count mismanagement and memory corruption and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
8) Memory corruption (CVE-ID: CVE-2017-10922)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/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 a local attacker to cause DoS conditions.
The weakness exists due to improper handling of MMIO region grant references by the grant-table feature. A local attacker can trigger loss of grant trackability and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
Remediation
Install update from vendor's website.