Red Hat Enterprise MRG 2 update for kernel-rt
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2018-3620 CVE-2018-3639 CVE-2018-3646 |
| CWE-ID | CWE-200 CWE-362 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software |
MRG Realtime Server applications / Application servers kernel-rt (Red Hat package) Operating systems & Components / Operating system package or component |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Side-channel attack
EUVDB-ID: #VU14411
Risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-3620
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to obtain potentially sensitive information.
The vulnerability exists due to an error in systems with microprocessors utilizing speculative execution and address translations . A local attacker can trigger terminal page fault, conduct side-channel attack and gain access to potentially sensitive information residing in the L1 data cache.
Install updates from vendor's website.
MRG Realtime: 2
kernel-rt (Red Hat package): before 3.10.0-693.37.4.rt56.629.el6rt
CPE2.3- cpe:2.3:a:red_hat:mrg_realtime:2:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHSA-2018:2396
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.
2) Speculative Store Bypass
EUVDB-ID: #VU12911
Risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-3639
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to obtain potentially sensitive information on the target system.
The weakness exists due to race conditions in CPU cache processing. A local attacker can conduct a side-channel attack to exploit a flaw in the speculative execution of Load and Store instructions to read privileged memory.
Note: the vulnerability is referred to as "Spectre variant 4".
Install updates from vendor's website.
MRG Realtime: 2
kernel-rt (Red Hat package): before 3.10.0-693.37.4.rt56.629.el6rt
CPE2.3- cpe:2.3:a:red_hat:mrg_realtime:2:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHSA-2018:2396
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.
3) Information disclosure
EUVDB-ID: #VU15451
Risk: Low
CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-3646
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows an adjacent attacker to obtain potentially sensitive information on the target system.
The weakness exists on the systems with microprocessors utilizing speculative execution and address translations due to an error in Hypervisor. An adjacent attacker can access information residing in the L1 data cache via a terminal page fault and a side-channel analysis.
MitigationInstall updates from vendor's website.
MRG Realtime: 2
kernel-rt (Red Hat package): before 3.10.0-693.37.4.rt56.629.el6rt
CPE2.3- cpe:2.3:a:red_hat:mrg_realtime:2:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHSA-2018:2396
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.
4) Side-channel attack
EUVDB-ID: #VU14412
Risk: Low
CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-3646
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows an adjacent attacker to obtain potentially sensitive information.
The vulnerability exists due to an error in systems with microprocessors utilizing speculative execution and address translations. An adjacent attacker with guest OS privilege can trigger terminal page fault, conduct side-channel attack and gain access to potentially sensitive information residing in the L1 data cache.
Install updates from vendor's website.
MRG Realtime: 2
kernel-rt (Red Hat package): before 3.10.0-693.37.4.rt56.629.el6rt
CPE2.3- cpe:2.3:a:red_hat:mrg_realtime:2:*:*:*:*:*:*:*
- cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHSA-2018:2396
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.
