CVE-2020-10711
Published: 12 May 2020
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.
From the Ubuntu Security Team
Matthew Sheets discovered that the SELinux network label handling implementation in the Linux kernel could be coerced into de-referencing a NULL pointer. A remote attacker could use this to cause a denial of service (system crash).
Notes
Author | Note |
---|---|
sbeattie | SELinux is not the default MAC used in Ubuntu |
Priority
Status
Package | Release | Status |
---|---|---|
linux-hwe-5.4 Launchpad, Ubuntu, Debian |
upstream |
Released
(5.7~rc6)
|
bionic |
Released
(5.4.0-40.44~18.04.1)
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-raspi-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1013.13~18.04.1)
|
upstream |
Released
(5.7~rc6)
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-oem-5.6 Launchpad, Ubuntu, Debian |
focal |
Released
(5.6.0-1011.11)
|
bionic |
Does not exist
|
|
eoan |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-109.110)
|
eoan |
Released
(5.3.0-62.56)
|
|
focal |
Released
(5.4.0-40.44)
|
|
trusty |
Ignored
(was needed ESM criteria)
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Released
(4.4.0-185.215)
|
|
Patches: Introduced by 4b8feff251da3d7058b5779e21b33a85c686b974 |
||
linux-aws Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1077.81)
|
eoan |
Released
(5.3.0-1030.32)
|
|
trusty |
Released
(4.4.0-1074.78)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Released
(4.4.0-1110.121)
|
|
focal |
Released
(5.4.0-1018.18)
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-62.56~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Released
(4.15.0-107.108~16.04.1)
|
|
linux-aws-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1030.32~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-azure-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1091.101)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-aws-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1018.18~18.04.1)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-aws-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Released
(4.15.0-1074.78~16.04.1)
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Released
(5.3.0-1032.33)
|
|
focal |
Released
(5.4.0-1020.20)
|
|
trusty |
Released
(4.15.0-1091.101~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Released
(4.15.0-1091.101~16.04.1)
|
|
linux-azure-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1032.33~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-azure-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1020.20~18.04.1)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Released
(5.3.0-1030.32)
|
|
focal |
Released
(5.4.0-1019.19)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Released
(4.15.0-1078.88~16.04.1)
|
|
linux-gcp-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1078.88)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-gcp-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1030.32~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-gcp-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1019.19~18.04.2)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-gke-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1064.67)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-gke-5.0 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1043.44)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-gke-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1030.32~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Ignored
(end of life, was needs-triage)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1069.70)
|
eoan |
Released
(5.3.0-1024.26)
|
|
focal |
Released
(5.4.0-1018.18)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Released
(4.4.0-1076.83)
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Released
(4.4.0-185.215~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1091.101)
|
eoan |
Ignored
(end of life)
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Ignored
(end of standard support, was needs-triage)
|
|
linux-oem-osp1 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1063.68)
|
eoan |
Ignored
(end of life)
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1048.52)
|
eoan |
Released
(5.3.0-1028.30)
|
|
focal |
Released
(5.4.0-1019.19)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Released
(4.15.0-1046.50~16.04.1)
|
|
linux-oracle-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-oracle-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1028.30~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-oracle-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1019.19~18.04.1)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-raspi Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Released
(5.4.0-1013.13)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1065.69)
|
eoan |
Released
(5.3.0-1028.30)
|
|
focal |
Ignored
(end of life, was needs-triage)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Released
(4.4.0-1135.144)
|
|
linux-raspi2-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1028.30~18.04.2)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-riscv Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Released
(5.4.0-28.32)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Does not exist
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1081.88)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc6)
|
|
xenial |
Released
(4.4.0-1139.147)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.9 |
Attack vector | Network |
Attack complexity | High |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10711
- https://www.openwall.com/lists/oss-security/2020/05/12/2
- https://lore.kernel.org/netdev/07d99ae197bfdb2964931201db67b6cd0b38db5b.1589276729.git.pabeni@redhat.com/T/#u
- 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
- NVD
- Launchpad
- Debian