NULL Pointer Dereference Affecting bpftool package, versions <0:3.10.0-1127.8.2.el7
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Test your applications- Snyk ID SNYK-CENTOS7-BPFTOOL-2165250
- published 26 Jul 2021
- disclosed 12 May 2020
Introduced: 12 May 2020
CVE-2020-10711 Open this link in a new tabHow to fix?
Upgrade Centos:7 bpftool to version 0:3.10.0-1127.8.2.el7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
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.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10711
- https://security.netapp.com/advisory/ntap-20200608-0001/
- https://www.openwall.com/lists/oss-security/2020/05/12/2
- https://access.redhat.com/security/cve/CVE-2020-10711
- https://www.debian.org/security/2020/dsa-4698
- https://www.debian.org/security/2020/dsa-4699
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://access.redhat.com/errata/RHSA-2020:2082
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
- https://usn.ubuntu.com/4411-1/
- https://usn.ubuntu.com/4412-1/
- https://usn.ubuntu.com/4413-1/
- https://usn.ubuntu.com/4414-1/
- https://usn.ubuntu.com/4419-1/