Red Hat update for Linux Kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2018-1087 CVE-2018-8897 CVE-2018-1000199 |
| CWE-ID | CWE-703 CWE-388 |
| Exploitation vector | Local network |
| Public exploit | Vulnerability #2 is being exploited in the wild. |
| Vulnerable software |
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions Operating systems & Components / Operating system package or component Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions Operating systems & Components / Operating system package or component kernel (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux Server - TUS Operating systems & Components / Operating system Red Hat Enterprise Linux for Power, little endian - Extended Update Support Operating systems & Components / Operating system Red Hat Enterprise Linux Server - AUS Operating systems & Components / Operating system Red Hat Enterprise Linux for Power, big endian - Extended Update Support Operating systems & Components / Operating system Red Hat Enterprise Linux for IBM z Systems - Extended Update Support Operating systems & Components / Operating system Red Hat Enterprise Linux Server - Extended Update Support Operating systems & Components / Operating system Red Hat Enterprise Linux EUS Compute Node Operating systems & Components / Operating system Other |
| Vendor |
Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Improper check or handling of exceptional conditions
EUVDB-ID: #VU12520
Risk: Low
CVSSv4.0: 6.3 [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:Clear]
CVE-ID: CVE-2018-1087
CWE-ID:
CWE-703 - Improper Check or Handling of Exceptional Conditions
Exploit availability: No
DescriptionThe vulnerability allows an adjacent attacker to cause DoS condition or gain elevated privileges on the target system.
The weakness exists in the Linux kernel KVM hypervisor due to improper handling of debug exceptions delivered after a stack switch operation via mov SS or pop SS instructions. During the stack switch operation, the exceptions are deferred. An adjacent attacker can cause the service to crash or gain root privileges.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions: 7.3
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 7.3
Red Hat Enterprise Linux Server - TUS: 7.3
Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 7.3
Red Hat Enterprise Linux Server - AUS: 7.3
Red Hat Enterprise Linux for Power, big endian - Extended Update Support: 7.3
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support: 7.3
Red Hat Enterprise Linux Server - Extended Update Support: 7.3
kernel (Red Hat package): 3.10.0-123.1.2.el7 - 3.10.0-514.44.1.el7
Red Hat Enterprise Linux EUS Compute Node: 7.3
:
CPE2.3- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_update_services_for_sap_solutions:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_for_ibm_power_le_-_update_services_for_sap_solutions:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_tus:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power_little_endian_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_aus:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power_big_endian_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_ibm_z_systems_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel_redhat_package:3.10.0-123.1.2.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel_redhat_package:3.10.0-123.4.2.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_eus_compute_node:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:::::*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2018:1348
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Privilege escalation
EUVDB-ID: #VU12450
Risk: Low
CVSSv4.0: 8.5 [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:A/U:Clear]
CVE-ID: CVE-2018-8897
CWE-ID:
CWE-703 - Improper Check or Handling of Exceptional Conditions
Exploit availability: Yes
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists due to improper implementation of Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) on multiple system kernels, which results in an unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS. A local user can execute arbitrary code with elevated privileges.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions: 7.3
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 7.3
Red Hat Enterprise Linux Server - TUS: 7.3
Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 7.3
Red Hat Enterprise Linux Server - AUS: 7.3
Red Hat Enterprise Linux for Power, big endian - Extended Update Support: 7.3
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support: 7.3
Red Hat Enterprise Linux Server - Extended Update Support: 7.3
kernel (Red Hat package): 3.10.0-123.1.2.el7 - 3.10.0-514.44.1.el7
Red Hat Enterprise Linux EUS Compute Node: 7.3
:
CPE2.3- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_update_services_for_sap_solutions:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_for_ibm_power_le_-_update_services_for_sap_solutions:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_tus:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power_little_endian_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_aus:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power_big_endian_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_ibm_z_systems_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel_redhat_package:3.10.0-123.1.2.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel_redhat_package:3.10.0-123.4.2.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_eus_compute_node:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:::::*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2018:1348
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
3) Error handling
EUVDB-ID: #VU12337
Risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-1000199
CWE-ID:
CWE-388 - Error Handling
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the modify_user_hw_breakpoint() function due to error handling flaw. A local attacker can cause the service to crash.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions: 7.3
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 7.3
Red Hat Enterprise Linux Server - TUS: 7.3
Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 7.3
Red Hat Enterprise Linux Server - AUS: 7.3
Red Hat Enterprise Linux for Power, big endian - Extended Update Support: 7.3
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support: 7.3
Red Hat Enterprise Linux Server - Extended Update Support: 7.3
kernel (Red Hat package): 3.10.0-123.1.2.el7 - 3.10.0-514.44.1.el7
Red Hat Enterprise Linux EUS Compute Node: 7.3
:
CPE2.3- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_update_services_for_sap_solutions:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_for_ibm_power_le_-_update_services_for_sap_solutions:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_tus:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power_little_endian_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_aus:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power_big_endian_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_ibm_z_systems_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_extended_update_support:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel_redhat_package:3.10.0-123.1.2.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel_redhat_package:3.10.0-123.4.2.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_eus_compute_node:7.3:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:::::*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2018:1348
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
