PT-2018-18102 · Linux+3 · Linux Kernel+3

Andrey Konovalov · Published 2017-12-17 · Updated 2019-03-26 · CVE-2018-7492

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 4.14.7

Description A NULL pointer dereference issue was discovered in the rds rdma map() function, allowing local attackers to cause a system panic and a denial-of-service. This issue is related to RDS GET MR and RDS GET MR FOR DEST.

Recommendations For Linux kernel versions prior to 4.14.7, update to version 4.14.7 or later to resolve the issue. As a temporary workaround, consider restricting access to the rds rdma map() function to minimize the risk of exploitation.

Exploit

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2017-2806

ALT-PU-2018-1991

CVE-2018-7492

DLA-1369-1

DSA-4187-1

OPENSUSE-SU-2018_1418-1

OPENSUSE-SU-2018_2119-1

SUSE-SU-2018:1366-1

SUSE-SU-2018:1761-1

SUSE-SU-2018:1762-1

SUSE-SU-2018:1816-1

SUSE-SU-2018:1855-1

SUSE-SU-2018:1855-2

SUSE-SU-2018:2092-1

SUSE-SU-2018:2332-1

SUSE-SU-2018:2366-1

SUSE-SU-2018:2637-1

USN-3619-1

USN-3619-2

USN-3674-1

USN-3674-2

USN-3677-1

USN-3677-2

Affected Products

Alt Linux

Linux Kernel

Suse

Ubuntu

References · 548

• 🔥 https://xorl.wordpress.com/2017/12/18/linux-kernel-rdma-null-pointer-dereference · Exploit
• https://github.com/torvalds/linux/commit/f3069c6d33f6ae63a1668737bc78aaaa51bff7ca · Patch
• https://osv.dev/vulnerability/USN-3677-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-16536 · Vendor Advisory
• https://osv.dev/vulnerability/USN-3674-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-7492 · Security Note
• https://ubuntu.com/security/CVE-2017-16537 · Vendor Advisory
• https://usn.ubuntu.com/3619-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-1000026 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-17448 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2018:2332-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3619-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-6927 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-5332 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-8087 · Vendor Advisory