CVE-2020-10711

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.67% Top 30%
Vendor Advisory debian.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com
Affected: Red Hat Kernel
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10711 issue tracking third party advisory patch
https://www.openwall.com/lists/oss-security/2020/05/12/2 mailing list third party advisory patch
https://security.netapp.com/advisory/ntap-20200608-0001/ third party advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html third party advisory mailing list
https://www.debian.org/security/2020/dsa-4698 third party advisory vendor advisory
https://www.debian.org/security/2020/dsa-4699 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html mailing list third party advisory vendor advisory
https://usn.ubuntu.com/4413-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4411-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4412-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4419-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4414-1/ third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-10711?
CVE-2020-10711 has been scored as a medium severity vulnerability.
How to fix CVE-2020-10711?
To fix CVE-2020-10711, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-10711 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-10711 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-10711?
CVE-2020-10711 affects Red Hat Kernel.
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