CentOS 7 update for kernel



Published: 2020-11-23
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2019-20811
CVE-2020-14331
CWE ID CWE-20
CWE-787
Exploitation vector Local
Public exploit N/A
Vulnerable software
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CentOS
Operating systems & Components / Operating system

Vendor CentOS Project

Security Advisory

1) Input validation error

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-20811

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a local authenticated user to manipulate data.

An issue was discovered in the Linux kernel before 5.0.6. In rx_queue_add_kobject() and netdev_queue_add_kobject() in net/core/net-sysfs.c, a reference count is mishandled, aka CID-a3e23f719f5c.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

CPE External links

https://lists.centos.org/pipermail/centos-announce/2020-November/035868.html

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) Out-of-bounds write

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-14331

CWE-ID: CWE-787 - Out-of-bounds Write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the Linux kernel’s implementation of the invert video code on VGA consoles. A local user with can run a specially crafted program to call VT_RESIZE IOCTL, trigger an out-of-bounds write and execute arbitrary code on the target system with elevated privileges.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 7

CPE External links

https://lists.centos.org/pipermail/centos-announce/2020-November/035868.html

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.



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