Red Hat Enterprise Linux 7 update for kernel-rt
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2018-20856 CVE-2019-10126 CVE-2019-3846 CVE-2019-9506 |
| CWE-ID | CWE-416 CWE-122 CWE-119 CWE-310 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Red Hat Enterprise Linux for Real Time Operating systems & Components / Operating system Red Hat Enterprise Linux for Real Time for NFV Operating systems & Components / Operating system 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) Use-after-free
EUVDB-ID: #VU19568
Risk: Low
CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-20856
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to execute arbitrary code on a targeted system.
The vulnerability exists due to a use-after-free error when the "__blk_drain_queue()" function in the "block/blk-core.c" file mishandles error cases. A local authenticated attacker can access the system and execute an application that submits malicious input, cause a use-after-free memory operation error and execute arbitrary code on the targeted system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationInstall updates from vendor's website.
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
kernel-rt (Red Hat package): before 3.10.0-1062.4.1.rt56.1027.el7
External linkshttp://access.redhat.com/errata/RHSA-2019:3089
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) Heap-based buffer overflow
EUVDB-ID: #VU20810
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-10126
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform a denial of service (DoS) condition or execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the Marvell Wireless LAN device driver in "mwifiex_uap_parse_tail_ies" function in "drivers/net/wireless/marvell/mwifiex/ie.c". A local authenticated user can trigger heap-based buffer overflow and cause a denial of service (system crash) or possibly execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
kernel-rt (Red Hat package): before 3.10.0-1062.4.1.rt56.1027.el7
External linkshttp://access.redhat.com/errata/RHSA-2019:3089
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) Buffer overflow
EUVDB-ID: #VU28399
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-3846
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
A flaw that allowed an attacker to corrupt memory and possibly escalate privileges was found in the mwifiex kernel module while connecting to a malicious wireless network.
MitigationInstall updates from vendor's website.
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
kernel-rt (Red Hat package): before 3.10.0-1062.4.1.rt56.1027.el7
External linkshttp://access.redhat.com/errata/RHSA-2019:3089
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) Cryptographic issues
EUVDB-ID: #VU20290
Risk: Low
CVSSv3.1: 3.5 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-9506
CWE-ID:
CWE-310 - Cryptographic Issues
Exploit availability: No
DescriptionThe vulnerability allows an attacker to gain access to sensitive information.
The vulnerability exists due to a weakness in Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR) protocol core specification that allows an attacker with close proximity to the affected system to perform a man-in-the-middle attack on an encrypted Bluetooth connection.
Successful exploitation of the vulnerability may allow an attacker to gain access to sensitive information or perform unauthorized actions.
MitigationInstall updates from vendor's website.
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
kernel-rt (Red Hat package): before 3.10.0-1062.4.1.rt56.1027.el7
External linkshttp://access.redhat.com/errata/RHSA-2019:3089
Q & A
Can this vulnerability be exploited remotely?
No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
