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.
Published: 2020-05-22
Score: 5.9 Medium
EPSS: 5.4% Low
KEV: No
Impact: n/a
Action: n/a
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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2242-1 linux-4.9 security update
Debian DSA Debian DSA DSA-4698-1 linux security update
Debian DSA Debian DSA DSA-4699-1 linux security update
EUVD EUVD EUVD-2020-3141 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.
Ubuntu USN Ubuntu USN USN-4411-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4412-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4413-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4414-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4419-1 Linux kernel vulnerabilities
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Canonical Ubuntu Linux
Debian Debian Linux
Linux Linux Kernel
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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-04T11:14:14.192Z

Reserved: 2020-03-20T00:00:00.000Z

Link: CVE-2020-10711

cve-icon Vulnrichment

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cve-icon NVD

Status : Modified

Published: 2020-05-22T15:15:11.207

Modified: 2024-11-21T04:55:54.213

Link: CVE-2020-10711

cve-icon Redhat

Severity : Important

Publid Date: 2020-05-12T12:00:00Z

Links: CVE-2020-10711 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses