Linux Kernel 2.6.x/3.10.x/4.14.x create_elf_tables integer overflow

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6.8$0-$5k0.00

A vulnerability, which was classified as problematic, was found in Linux Kernel 2.6.x/3.10.x/4.14.x (Operating System). This affects the function create_elf_tables. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An integer overflow flaw was found in the Linux kernel's create_elf_tables() function. An unprivileged local user with access to SUID (or otherwise privileged) binary could use this flaw to escalate their privileges on the system. Kernel versions 2.6.x, 3.10.x and 4.14.x are believed to be vulnerable.

The bug was discovered 09/25/2018. The weakness was published 09/25/2018 with Qualys (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2018-14634 since 07/27/2018. Attacking locally is a requirement. A authentication is required for exploitation. Technical details and a public exploit are known.

A public exploit has been developed by Qualys Corporation in C and been published 1 days after the advisory. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 117787 (Scientific Linux Security Update : kernel on SL7.x x86_64 (20180925)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Scientific Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157815 (Oracle Enterprise Linux Security Update for kernel (ELSA-2018-2846)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (117787) and Exploit-DB (45516). Similar entries are available at 109137 and 123694.

Productinfo

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
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NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Qualys Corporation
Programming Language: 🔍
Download: 🔍

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Nessus ID: 117787
Nessus Name: Scientific Linux Security Update : kernel on SL7.x x86_64 (20180925)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

07/27/2018 🔍
09/25/2018 +60 days 🔍
09/25/2018 +0 days 🔍
09/25/2018 +0 days 🔍
09/25/2018 +0 days 🔍
09/25/2018 +0 days 🔍
09/26/2018 +1 days 🔍
09/26/2018 +0 days 🔍
09/27/2018 +1 days 🔍
05/19/2023 +1695 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2018:2748
Organization: Qualys
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-14634 (🔍)
SecurityFocus: 105407 - Linux Kernel 'create_elf_tables()' Function Local Integer Overflow Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 09/26/2018 07:29
Updated: 05/19/2023 07:05
Changes: 09/26/2018 07:29 (71), 10/02/2018 11:02 (7), 04/07/2020 16:36 (6), 05/19/2023 06:51 (7), 05/19/2023 07:05 (12)
Complete: 🔍
Committer: misc

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