Red Hat update for kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2018-3620 CVE-2018-3646 CVE-2018-5390 |
| CWE-ID | CWE-200 CWE-400 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
redhat-virtualization-host (Red Hat package) Operating systems & Components / Operating system package or component redhat-release-virtualization-host (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Virtualization Host Web applications / Remote management & hosting panels Red Hat Virtualization Server applications / Virtualization software Other |
| Vendor |
Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 3 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 - Exposure of sensitive information to an unauthorized actor
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 update from vendor's website.
Vulnerable software versionsredhat-virtualization-host (Red Hat package): 4.2-20180508.0.el7_5 - 4.2-20180724.0.el7_5
redhat-release-virtualization-host (Red Hat package): 4.2-3.0.el7 - 4.2-5.0.el7
Red Hat Virtualization Host: 4
Red Hat Virtualization: 4
:
CPE2.3- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.2-20180508.0.el7_5:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.2-20180518.2.el7_5:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.2-20180531.0.el7_5:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.2-3.0.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.2-3.1.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.2-4.3.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:red_hat_virtualization_host:4:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:red_hat_virtualization:4:*:*:*:*:*:*:*
- cpe:2.3:::::*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2018:2403
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) 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 - Exposure of sensitive information to an unauthorized actor
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 update from vendor's website.
Vulnerable software versionsredhat-virtualization-host (Red Hat package): 4.2-20180508.0.el7_5 - 4.2-20180724.0.el7_5
redhat-release-virtualization-host (Red Hat package): 4.2-3.0.el7 - 4.2-5.0.el7
Red Hat Virtualization Host: 4
Red Hat Virtualization: 4
:
CPE2.3- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.2-20180508.0.el7_5:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.2-20180518.2.el7_5:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.2-20180531.0.el7_5:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.2-3.0.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.2-3.1.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.2-4.3.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:red_hat_virtualization_host:4:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:red_hat_virtualization:4:*:*:*:*:*:*:*
- cpe:2.3:::::*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2018:2403
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.
3) Resource exhaustion
EUVDB-ID: #VU14200
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2018-5390
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to the system uses an inefficient TCP reassembly algorithm. A remote attacker can send specially crafted packets within ongoing TCP sessions to consume excessive CPU resources and cause the service to crash.
Note: The issue has been called "SegmentSmack".
MitigationInstall update from vendor's website.
Vulnerable software versionsredhat-virtualization-host (Red Hat package): 4.2-20180508.0.el7_5 - 4.2-20180724.0.el7_5
redhat-release-virtualization-host (Red Hat package): 4.2-3.0.el7 - 4.2-5.0.el7
Red Hat Virtualization Host: 4
Red Hat Virtualization: 4
:
CPE2.3- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.2-20180508.0.el7_5:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.2-20180518.2.el7_5:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-virtualization-host_redhat_package:4.2-20180531.0.el7_5:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.2-3.0.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.2-3.1.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:redhat-release-virtualization-host_redhat_package:4.2-4.3.el7:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:a:red_hat:red_hat_virtualization_host:4:*:*:*:*:*:*:*
- cpe:2.3:a:red_hat:red_hat_virtualization:4:*:*:*:*:*:*:*
- cpe:2.3:::::*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2018:2403
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
