CVE-2020-10711: Null Pointer Dereference
First published: Fri Apr 17 2020(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <0:2.6.32-754.29.2.el6 | 0:2.6.32-754.29.2.el6 |
| redhat/kernel-rt | <0:3.10.0-1127.8.2.rt56.1103.el7 | 0:3.10.0-1127.8.2.rt56.1103.el7 |
| redhat/kernel | <0:3.10.0-1127.8.2.el7 | 0:3.10.0-1127.8.2.el7 |
| redhat/kernel-alt | <0:4.14.0-115.21.2.el7a | 0:4.14.0-115.21.2.el7a |
| redhat/kernel | <0:3.10.0-327.88.1.el7 | 0:3.10.0-327.88.1.el7 |
| redhat/kernel | <0:3.10.0-514.76.1.el7 | 0:3.10.0-514.76.1.el7 |
| redhat/kernel | <0:3.10.0-693.67.1.el7 | 0:3.10.0-693.67.1.el7 |
| redhat/kernel | <0:3.10.0-957.54.1.el7 | 0:3.10.0-957.54.1.el7 |
| redhat/kernel | <0:3.10.0-1062.26.1.el7 | 0:3.10.0-1062.26.1.el7 |
| redhat/kernel-rt | <0:4.18.0-193.1.2.rt13.53.el8_2 | 0:4.18.0-193.1.2.rt13.53.el8_2 |
| redhat/kernel | <0:4.18.0-193.1.2.el8_2 | 0:4.18.0-193.1.2.el8_2 |
| redhat/kernel | <0:4.18.0-80.23.2.el8_0 | 0:4.18.0-80.23.2.el8_0 |
| redhat/kernel | <0:4.18.0-147.13.2.el8_1 | 0:4.18.0-147.13.2.el8_1 |
| redhat/kernel-rt | <1:3.10.0-693.67.1.rt56.665.el6 | 1:3.10.0-693.67.1.rt56.665.el6 |
| Linux Linux kernel | <5.7 | |
| Redhat 3scale | =2.0 | |
| Redhat Openstack | =13 | |
| Redhat Virtualization Host | =4.0 | |
| Redhat Enterprise Linux | =6.0 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux Aus | =7.4 | |
| Redhat Enterprise Linux Server Tus | =7.4 | |
| Redhat Messaging Realtime Grid | =2.0 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| openSUSE Leap | =15.1 | |
| openSUSE Leap | =15.2 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =19.10 | |
| Canonical Ubuntu Linux | =20.04 | |
| redhat/kernel | <5.7 | 5.7 |
| ubuntu/linux | <4.15.0-109.110 | 4.15.0-109.110 |
| ubuntu/linux | <5.3.0-62.56 | 5.3.0-62.56 |
| ubuntu/linux | <5.4.0-40.44 | 5.4.0-40.44 |
| ubuntu/linux | <5.7~ | 5.7~ |
| ubuntu/linux | <4.4.0-185.215 | 4.4.0-185.215 |
| ubuntu/linux-aws | <4.15.0-1077.81 | 4.15.0-1077.81 |
| ubuntu/linux-aws | <5.3.0-1030.32 | 5.3.0-1030.32 |
| ubuntu/linux-aws | <5.4.0-1018.18 | 5.4.0-1018.18 |
| ubuntu/linux-aws | <4.4.0-1074.78 | 4.4.0-1074.78 |
| ubuntu/linux-aws | <5.7~ | 5.7~ |
| ubuntu/linux-aws | <4.4.0-1110.121 | 4.4.0-1110.121 |
| ubuntu/linux-aws-5.0 | <5.7~ | 5.7~ |
| ubuntu/linux-aws-5.3 | <5.3.0-1030.32~18.04.1 | 5.3.0-1030.32~18.04.1 |
| ubuntu/linux-aws-5.3 | <5.7~ | 5.7~ |
| ubuntu/linux-aws-5.4 | <5.7~ | 5.7~ |
| ubuntu/linux-aws-hwe | <5.7~ | 5.7~ |
| ubuntu/linux-aws-hwe | <4.15.0-1074.78~16.04.1 | 4.15.0-1074.78~16.04.1 |
| ubuntu/linux-azure | <5.3.0-1032.33 | 5.3.0-1032.33 |
| ubuntu/linux-azure | <5.4.0-1020.20 | 5.4.0-1020.20 |
| ubuntu/linux-azure | <4.15.0-1091.101~14.04.1 | 4.15.0-1091.101~14.04.1 |
| ubuntu/linux-azure | <5.7~ | 5.7~ |
| ubuntu/linux-azure | <4.15.0-1091.101~16.04.1 | 4.15.0-1091.101~16.04.1 |
| ubuntu/linux-azure-4.15 | <4.15.0-1091.101 | 4.15.0-1091.101 |
| ubuntu/linux-azure-4.15 | <5.7~ | 5.7~ |
| ubuntu/linux-azure-5.3 | <5.3.0-1032.33~18.04.1 | 5.3.0-1032.33~18.04.1 |
| ubuntu/linux-azure-5.3 | <5.7~ | 5.7~ |
| ubuntu/linux-azure-5.4 | <5.7~ | 5.7~ |
| ubuntu/linux-azure-edge | <5.7~ | 5.7~ |
| ubuntu/linux-gcp | <5.3.0-1030.32 | 5.3.0-1030.32 |
| ubuntu/linux-gcp | <5.4.0-1019.19 | 5.4.0-1019.19 |
| ubuntu/linux-gcp | <5.7~ | 5.7~ |
| ubuntu/linux-gcp | <4.15.0-1078.88~16.04.1 | 4.15.0-1078.88~16.04.1 |
| ubuntu/linux-gcp-4.15 | <4.15.0-1078.88 | 4.15.0-1078.88 |
| ubuntu/linux-gcp-4.15 | <5.7~ | 5.7~ |
| ubuntu/linux-gcp-5.3 | <5.3.0-1030.32~18.04.1 | 5.3.0-1030.32~18.04.1 |
| ubuntu/linux-gcp-5.3 | <5.7~ | 5.7~ |
| ubuntu/linux-gcp-edge | <5.7~ | 5.7~ |
| ubuntu/linux-gke-4.15 | <4.15.0-1064.67 | 4.15.0-1064.67 |
| ubuntu/linux-gke-4.15 | <5.7~ | 5.7~ |
| ubuntu/linux-gke-5.0 | <5.0.0-1043.44 | 5.0.0-1043.44 |
| ubuntu/linux-gke-5.0 | <5.7~ | 5.7~ |
| ubuntu/linux-gke-5.3 | <5.3.0-1030.32~18.04.1 | 5.3.0-1030.32~18.04.1 |
| ubuntu/linux-gke-5.3 | <5.7~ | 5.7~ |
| ubuntu/linux-hwe | <5.3.0-62.56~18.04.1 | 5.3.0-62.56~18.04.1 |
| ubuntu/linux-hwe | <5.7~ | 5.7~ |
| ubuntu/linux-hwe | <4.15.0-107.108~16.04.1 | 4.15.0-107.108~16.04.1 |
| ubuntu/linux-hwe-5.4 | <5.4.0-40.44~18.04.1 | 5.4.0-40.44~18.04.1 |
| ubuntu/linux-hwe-5.4 | <5.7~ | 5.7~ |
| ubuntu/linux-hwe-edge | <5.7~ | 5.7~ |
| ubuntu/linux-kvm | <4.15.0-1069.70 | 4.15.0-1069.70 |
| ubuntu/linux-kvm | <5.3.0-1024.26 | 5.3.0-1024.26 |
| ubuntu/linux-kvm | <5.4.0-1018.18 | 5.4.0-1018.18 |
| ubuntu/linux-kvm | <5.7~ | 5.7~ |
| ubuntu/linux-kvm | <4.4.0-1076.83 | 4.4.0-1076.83 |
| ubuntu/linux-lts-trusty | <5.7~ | 5.7~ |
| ubuntu/linux-lts-xenial | <4.4.0-185.215~14.04.1 | 4.4.0-185.215~14.04.1 |
| ubuntu/linux-lts-xenial | <5.7~ | 5.7~ |
| ubuntu/linux-oem | <4.15.0-1091.101 | 4.15.0-1091.101 |
| ubuntu/linux-oem | <5.7~ | 5.7~ |
| ubuntu/linux-oem-5.6 | <5.6.0-1011.11 | 5.6.0-1011.11 |
| ubuntu/linux-oem-5.6 | <5.7~ | 5.7~ |
| ubuntu/linux-oem-osp1 | <5.0.0-1063.68 | 5.0.0-1063.68 |
| ubuntu/linux-oem-osp1 | <5.7~ | 5.7~ |
| ubuntu/linux-oracle | <4.15.0-1048.52 | 4.15.0-1048.52 |
| ubuntu/linux-oracle | <5.3.0-1028.30 | 5.3.0-1028.30 |
| ubuntu/linux-oracle | <5.4.0-1019.19 | 5.4.0-1019.19 |
| ubuntu/linux-oracle | <5.7~ | 5.7~ |
| ubuntu/linux-oracle | <4.15.0-1046.50~16.04.1 | 4.15.0-1046.50~16.04.1 |
| ubuntu/linux-oracle-5.0 | <5.7~ | 5.7~ |
| ubuntu/linux-oracle-5.3 | <5.3.0-1028.30~18.04.1 | 5.3.0-1028.30~18.04.1 |
| ubuntu/linux-oracle-5.3 | <5.7~ | 5.7~ |
| ubuntu/linux-raspi | <5.4.0-1013.13 | 5.4.0-1013.13 |
| ubuntu/linux-raspi | <5.7~ | 5.7~ |
| ubuntu/linux-raspi-5.4 | <5.7~ | 5.7~ |
| ubuntu/linux-raspi2 | <4.15.0-1065.69 | 4.15.0-1065.69 |
| ubuntu/linux-raspi2 | <5.3.0-1028.30 | 5.3.0-1028.30 |
| ubuntu/linux-raspi2 | <5.7~ | 5.7~ |
| ubuntu/linux-raspi2 | <4.4.0-1135.144 | 4.4.0-1135.144 |
| ubuntu/linux-raspi2-5.3 | <5.3.0-1028.30~18.04.2 | 5.3.0-1028.30~18.04.2 |
| ubuntu/linux-raspi2-5.3 | <5.7~ | 5.7~ |
| ubuntu/linux-riscv | <5.4.0-28.32 | 5.4.0-28.32 |
| ubuntu/linux-riscv | <5.7~ | 5.7~ |
| ubuntu/linux-snapdragon | <4.15.0-1081.88 | 4.15.0-1081.88 |
| ubuntu/linux-snapdragon | <5.7~ | 5.7~ |
| ubuntu/linux-snapdragon | <4.4.0-1139.147 | 4.4.0-1139.147 |
| debian/linux | 4.19.249-2 4.19.304-1 5.10.209-2 5.10.205-2 6.1.76-1 6.1.85-1 6.6.15-2 6.7.12-1 |
Remedy
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. This issue can only be resolved by applying updates.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-10711 https://nvd.nist.gov/vuln/detail/CVE-2020-10711
- https://bugzilla.redhat.com/show_bug.cgi?id=1825116
- https://access.redhat.com/errata/RHSA-2020:2103
- https://access.redhat.com/errata/RHSA-2020:2085
- https://access.redhat.com/errata/RHSA-2020:2082
- https://access.redhat.com/errata/RHSA-2020:2104
- https://access.redhat.com/errata/RHSA-2020:2285
- https://access.redhat.com/errata/RHSA-2020:2277
- https://access.redhat.com/errata/RHSA-2020:2214
- https://access.redhat.com/errata/RHSA-2020:2289
- https://access.redhat.com/errata/RHSA-2020:2291
- https://access.redhat.com/errata/RHSA-2020:2519
- https://access.redhat.com/errata/RHSA-2020:2522
- https://access.redhat.com/errata/RHSA-2020:2171
- https://access.redhat.com/errata/RHSA-2020:2102
- https://access.redhat.com/errata/RHSA-2020:2125
- https://access.redhat.com/errata/RHSA-2020:2429
- https://access.redhat.com/errata/RHSA-2020:2199
- https://access.redhat.com/errata/RHSA-2020:2203
- https://access.redhat.com/errata/RHSA-2020:2242
- https://access.redhat.com/security/cve/cve-2020-10711
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10711
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://security.netapp.com/advisory/ntap-20200608-0001/
- 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/
- https://www.debian.org/security/2020/dsa-4698
- https://www.debian.org/security/2020/dsa-4699
- https://www.openwall.com/lists/oss-security/2020/05/12/2
- https://launchpad.net/bugs/cve/CVE-2020-10711
- https://git.kernel.org/linus/4b8feff251da3d7058b5779e21b33a85c686b974
- https://lore.kernel.org/netdev/07d99ae197bfdb2964931201db67b6cd0b38db5b.1589276729.git.pabeni@redhat.com/T/#u
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1834778
- https://security-tracker.debian.org/tracker/CVE-2020-10711
- https://ubuntu.com/security/notices/USN-4411-1
- https://ubuntu.com/security/notices/USN-4412-1
- https://ubuntu.com/security/notices/USN-4413-1
- https://ubuntu.com/security/notices/USN-4414-1
- https://ubuntu.com/security/notices/USN-4419-1
- https://www.cve.org/CVERecord?id=CVE-2020-10711
- https://nvd.nist.gov/vuln/detail/CVE-2020-10711
- https://git.kernel.org/linus/eead1c2ea2509fd754c6da893a94f0e69e83ebe4
- https://ubuntu.com/security/CVE-2020-10711
Parent vulnerabilities
(Appears in the following advisories)
- RHSA-2020:2103
- RHSA-2020:2085
- RHSA-2020:2082
- RHSA-2020:2104
- RHSA-2020:2285
- RHSA-2020:2277
- RHSA-2020:2214
- RHSA-2020:2289
- RHSA-2020:2291
- RHSA-2020:2519
- RHSA-2020:2522
- RHSA-2020:2171
- RHSA-2020:2102
- RHSA-2020:2125
- RHSA-2020:2429
- RHSA-2020:2199
- RHSA-2020:2203
- RHSA-2020:2242
- USN-4411-1
- USN-4412-1
- USN-4413-1
- USN-4414-1
- USN-4419-1
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- agent/last-modified-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/severity
- agent/references
- agent/remedy
- agent/description
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-10711
- agent/software-canonical-lookup
- collector/nvd-cve
- source/NVD
- agent/weakness
- agent/tags
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- vendor/redhat
- canonical/redhat 3scale
- version/redhat 3scale/2.0
- canonical/redhat openstack
- version/redhat openstack/13
- canonical/redhat virtualization host
- version/redhat virtualization host/4.0
- canonical/redhat enterprise linux
- version/redhat enterprise linux/6.0
- version/redhat enterprise linux/7.0
- version/redhat enterprise linux/8.0
- canonical/redhat enterprise linux aus
- version/redhat enterprise linux aus/7.4
- canonical/redhat enterprise linux server tus
- version/redhat enterprise linux server tus/7.4
- canonical/redhat messaging realtime grid
- version/redhat messaging realtime grid/2.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.1
- version/opensuse leap/15.2
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/14.04
- version/canonical ubuntu linux/16.04
- version/canonical ubuntu linux/18.04
- version/canonical ubuntu linux/19.10
- version/canonical ubuntu linux/20.04
- package-manager/debian
- package-manager/ubuntu