Red Hat update for Linux Kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2018-8897 CVE-2018-1000199 |
| CWE-ID | CWE-703 CWE-388 |
| Exploitation vector | Local |
| Public exploit | Vulnerability #1 is being exploited in the wild. |
| Vulnerable software |
kernel-rt (Red Hat package) Operating systems & Components / Operating system package or component MRG Realtime Server applications / Application servers Other |
| Vendor |
Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) 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 versionskernel-rt (Red Hat package): 3.10.0-229.rt56.144.el6rt - 3.10.0-693.25.2.rt56.612.el6rt
MRG Realtime: 2
:
CPE2.3- cpe:2.3:o:red_hat:kernel-rt_redhat_package:3.10.0-229.rt56.144.el6rt:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel-rt_redhat_package:3.10.0-229.rt56.147.el6rt:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel-rt_redhat_package:3.10.0-229.rt56.151.el6rt:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:mrg_realtime:2:*:*:*:*:*:*:*
- cpe:2.3:::::*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2018:1354
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.
2) 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 versionskernel-rt (Red Hat package): 3.10.0-229.rt56.144.el6rt - 3.10.0-693.25.2.rt56.612.el6rt
MRG Realtime: 2
:
CPE2.3- cpe:2.3:o:red_hat:kernel-rt_redhat_package:3.10.0-229.rt56.144.el6rt:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel-rt_redhat_package:3.10.0-229.rt56.147.el6rt:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel-rt_redhat_package:3.10.0-229.rt56.151.el6rt:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:mrg_realtime:2:*:*:*:*:*:*:*
- cpe:2.3:::::*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2018:1354
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.
