CVE-2020-10711

Published May 22, 2020

Last updated a year ago

Overview

Description: A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem in versions before 5.7. This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service.
Source: secalert@redhat.com
NVD status: Modified

Risk scores

CVSS 3.1

Type: Primary
Base score: 5.9
Impact score: 3.6
Exploitability score: 2.2
Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: MEDIUM

CVSS 2.0

Type: Primary
Base score: 4.3
Impact score: 2.9
Exploitability score: 8.6
Vector string: AV:N/AC:M/Au:N/C:N/I:N/A:P

Weaknesses

nvd@nist.gov: CWE-476
secalert@redhat.com: CWE-476

Hype score: Not currently trending

Configurations

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Overview

Risk scores

CVSS 3.1

CVSS 2.0

Weaknesses

Social media

Configurations

References