Red Hat update for kernel

Published: 2019-12-03 | Updated: 2019-12-03
Severity High
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2019-5489
CVE-2018-9568
CWE ID CWE-200
CWE-843
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software Red Hat Enterprise Linux Server Subscribe
Vendor Red Hat Inc.

Security Advisory

1) Information disclosure

Severity: Low

CVSSv3: 5.2 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:U/RC:C] [PCI]

CVE-ID: CVE-2019-5489

CWE-ID: CWE-200 - Information Exposure

Description

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to a flaw in the mincore() implementation in mm/mincore.c. A local attacker can observe page cache access patterns of other processes on the same system and sniff secret information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Server: 6.5

CPE External links

https://access.redhat.com/errata/RHSA-2019:4056

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. However, proof of concept for this vulnerability is available.

2) Type Confusion

Severity: High

CVSSv3: 7.1 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2018-9568

CWE-ID: CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')

Description

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

The vulnerability exists due to a type confusion error in the sk_clone_lock() function in sock.c. A local user can run a specially crafted application to trigger memory corruption and execute arbitrary code on the target system with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Server: 6.5

CPE External links

https://access.redhat.com/errata/RHSA-2019:4056

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.