Vulnerability identifier: #VU15168

Vulnerability risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-14634

CWE-ID: CWE-190

Exploitation vector: Local

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.

External links
http://access.redhat.com/errata/RHSA-2018:2748
http://access.redhat.com/errata/RHSA-2018:2763
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14634
http://usn.ubuntu.com/3775-1/
http://usn.ubuntu.com/3775-2/
http://usn.ubuntu.com/3779-1/
http://www.exploit-db.com/exploits/45516/
http://www.openwall.com/lists/oss-security/2018/09/25/4

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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.