Red Hat update for kernel-rt

1) Integer overflow

EUVDB-ID: #VU15168

Risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-14634

CWE-ID: CWE-190 - Integer overflow

Exploit availability: Yes

Description

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

The vulnerability exists due to integer overflow in create_elf_tables() function when processing SUID binaries. A local unprivileged user can use this vulnerability to execute execute arbitrary code on the system with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-862.11.6.rt56.819.el7

Red Hat Enterprise Linux for Real Time: 7

Red Hat Enterprise Linux for Real Time for NFV: 7

:

CPE2.3

• cpe:2.3:a:red_hat:kernel-rt_redhat_package:3.10.0-229.1.2.rt56.141.2.el7_1:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:kernel-rt_redhat_package:3.10.0-229.4.2.rt56.141.6.el7_1:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:kernel-rt_redhat_package:3.10.0-229.11.1.rt56.141.11.el7_1:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_real_time:7:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_real_time_for_nfv:7:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:::::*:*:*:*:*:*:*

External links

https://access.redhat.com/errata/RHSA-2018:2763

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.