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CVE-2020-10711 Detail

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.


Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score matches with CNA score
CNA:  Red Hat, Inc.
Base Score:  5.9 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html Mailing List  Third Party Advisory 
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html Mailing List  Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10711 Issue Tracking  Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html Third Party Advisory 
https://security.netapp.com/advisory/ntap-20200608-0001/ Third Party Advisory 
https://usn.ubuntu.com/4411-1/ Third Party Advisory 
https://usn.ubuntu.com/4412-1/ Third Party Advisory 
https://usn.ubuntu.com/4413-1/ Third Party Advisory 
https://usn.ubuntu.com/4414-1/ Third Party Advisory 
https://usn.ubuntu.com/4419-1/ Third Party Advisory 
https://www.debian.org/security/2020/dsa-4698 Third Party Advisory 
https://www.debian.org/security/2020/dsa-4699 Third Party Advisory 
https://www.openwall.com/lists/oss-security/2020/05/12/2 Mailing List  Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST   Contributor acceptance level Red Hat, Inc.  

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Change History

15 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-10711
NVD Published Date:
05/22/2020
NVD Last Modified:
11/06/2023
Source:
Red Hat, Inc.