PT-2019-4437 · Linux+1 · Linux Kernel+1

Mao Wenan · Published 2019-09-18 · Updated 2023-01-17 · CVE-2019-18680

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 4.4.195

Description The issue is related to a NULL pointer dereference in the rds tcp kill sock() function, which can cause denial of service. This can be exploited by a remote attacker to disrupt service.

Recommendations For Linux kernel versions prior to 4.4.195, update to version 4.4.195 or later to resolve the issue. As a temporary workaround, consider restricting access to the rds tcp kill sock() function until a patch is available.

Exploit

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2020-00194

CVE-2019-18680

SUSE-SU-2019:2984-1

SUSE-SU-2019:3379-1

SUSE-SU-2020:2491-1

SUSE-SU-2020:2497-1

Affected Products

Linux Kernel

Suse

References · 201

• 🔥 https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.195 · Exploit
• 🔥 https://lkml.org/lkml/2019/9/18/337 · Exploit
• https://github.com/torvalds/linux/commit/91573ae4aed0a49660abdad4d42f2a0db995ee5e · Patch
• https://bdu.fstec.ru/vul/2020-00194 · Security Note
• https://ubuntu.com/security/CVE-2019-18680 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-18680 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2019:2984-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:2491-1 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=91573ae4aed0a49660abdad4d42f2a0db995ee5e · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:2497-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2019:3379-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-18680 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-18680 · Security Note
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-18680 · Security Note