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Vulnerability Details : CVE-2020-10711

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.
Publish Date : 2020-05-22 Last Update Date : 2020-07-29
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- CVSS Scores & Vulnerability Types

CVSS Score
4.3
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 476

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2020:2082: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20202082 unix
RHSA-2020:2085: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20202085 unix
RHSA-2020:2102: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20202102 unix
RHSA-2020:2103: kernel security update (Important) oval:com.redhat.rhsa:def:20202103 unix
RHSA-2020:2125: kpatch-patch security update (Important) oval:com.redhat.rhsa:def:20202125 unix
RHSA-2020:2171: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20202171 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2020-10711

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 8.0 * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
3 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
4 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
5 Application Redhat 3scale 2.0 * * * Version Details Vulnerabilities
6 OS Redhat Enterprise Linux 6.0 * * * Version Details Vulnerabilities
7 OS Redhat Enterprise Linux 7.0 * * * Version Details Vulnerabilities
8 OS Redhat Enterprise Linux 8.0 * * * Version Details Vulnerabilities
9 OS Redhat Enterprise Linux Aus 7.4 * * * Version Details Vulnerabilities
10 OS Redhat Enterprise Linux Server Tus 7.4 * * * Version Details Vulnerabilities
11 OS Redhat Messaging Realtime Grid 2.0 * * * Version Details Vulnerabilities
12 Application Redhat Openstack 13.0 * * * Version Details Vulnerabilities
13 Application Redhat Virtualization Host 4.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 3
Linux Linux Kernel 1
Redhat 3scale 1
Redhat Enterprise Linux 3
Redhat Enterprise Linux Aus 1
Redhat Enterprise Linux Server Tus 1
Redhat Messaging Realtime Grid 1
Redhat Openstack 1
Redhat Virtualization Host 1

- References For CVE-2020-10711

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10711 CONFIRM
https://www.openwall.com/lists/oss-security/2020/05/12/2 CONFIRM
https://security.netapp.com/advisory/ntap-20200608-0001/ CONFIRM
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
MLIST [debian-lts-announce] 20200610 [SECURITY] [DLA 2242-1] linux-4.9 security update
https://www.debian.org/security/2020/dsa-4699
DEBIAN DSA-4699
https://www.debian.org/security/2020/dsa-4698
DEBIAN DSA-4698
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
SUSE openSUSE-SU-2020:0801
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
SUSE openSUSE-SU-2020:0935
https://usn.ubuntu.com/4413-1/
UBUNTU USN-4413-1
https://usn.ubuntu.com/4411-1/
UBUNTU USN-4411-1
https://usn.ubuntu.com/4412-1/
UBUNTU USN-4412-1
https://usn.ubuntu.com/4419-1/
UBUNTU USN-4419-1
https://usn.ubuntu.com/4414-1/
UBUNTU USN-4414-1

- Metasploit Modules Related To CVE-2020-10711

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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