The following updates has been released for Ubuntu Linux:
USN-3934-1: PolicyKit vulnerability
USN-3935-1: BusyBox vulnerabilities
USN-3934-1: PolicyKit vulnerability
USN-3935-1: BusyBox vulnerabilities
USN-3934-1: PolicyKit vulnerability
==========================================================================
Ubuntu Security Notice USN-3934-1
April 03, 2019
policykit-1 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
PolicyKit could allow unintended access.
Software Description:
- policykit-1: framework for managing administrative policies and privileges
Details:
It was discovered that PolicyKit incorrectly relied on the fork() system
call in the Linux kernel being atomic. A local attacker could possibly use
this issue to gain access to services that have cached authorizations.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.10:
libpolkit-backend-1-0 0.105-21ubuntu0.4
policykit-1 0.105-21ubuntu0.4
Ubuntu 18.04 LTS:
libpolkit-backend-1-0 0.105-20ubuntu0.18.04.5
policykit-1 0.105-20ubuntu0.18.04.5
Ubuntu 16.04 LTS:
libpolkit-backend-1-0 0.105-14.1ubuntu0.5
policykit-1 0.105-14.1ubuntu0.5
Ubuntu 14.04 LTS:
libpolkit-backend-1-0 0.105-4ubuntu3.14.04.6
policykit-1 0.105-4ubuntu3.14.04.6
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3934-1
CVE-2019-6133
Package Information:
https://launchpad.net/ubuntu/+source/policykit-1/0.105-21ubuntu0.4
https://launchpad.net/ubuntu/+source/policykit-1/0.105-20ubuntu0.18.04.5
https://launchpad.net/ubuntu/+source/policykit-1/0.105-14.1ubuntu0.5
https://launchpad.net/ubuntu/+source/policykit-1/0.105-4ubuntu3.14.04.6
USN-3935-1: BusyBox vulnerabilities
==========================================================================
Ubuntu Security Notice USN-3935-1
April 03, 2019
busybox vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in BusyBox.
Software Description:
- busybox: Tiny utilities for small and embedded systems
Details:
Tyler Hicks discovered that BusyBox incorrectly handled symlinks inside tar
archives. If a user or automated system were tricked into processing a
specially crafted tar archive, a remote attacker could overwrite arbitrary
files outside of the current directory. This issue only affected Ubuntu
14.04 LTS and Ubuntu 16.04 LTS. (CVE-2011-5325)
Mathias Krause discovered that BusyBox incorrectly handled kernel module
loading restrictions. A local attacker could possibly use this issue to
bypass intended restrictions. This issue only affected Ubuntu 14.04 LTS.
(CVE-2014-9645)
It was discovered that BusyBox incorrectly handled certain ZIP archives. If
a user or automated system were tricked into processing a specially crafted
ZIP archive, a remote attacker could cause BusyBox to crash, leading to a
denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu
16.04 LTS. (CVE-2015-9261)
Nico Golde discovered that the BusyBox DHCP client incorrectly handled
certain malformed domain names. A remote attacker could possibly use this
issue to cause the DHCP client to crash, leading to a denial of service.
This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
(CVE-2016-2147)
Nico Golde discovered that the BusyBox DHCP client incorrectly handled
certain 6RD options. A remote attacker could use this issue to cause the
DHCP client to crash, leading to a denial of service, or possibly execute
arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04
LTS. (CVE-2016-2148)
It was discovered that BusyBox incorrectly handled certain bzip2 archives.
If a user or automated system were tricked into processing a specially
crafted bzip2 archive, a remote attacker could cause BusyBox to crash,
leading to a denial of service, or possibly execute arbitrary code. This
issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-15873)
It was discovered that BusyBox incorrectly handled tab completion. A local
attacker could possibly use this issue to execute arbitrary code. This
issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-16544)
It was discovered that the BusyBox wget utility incorrectly handled certain
responses. A remote attacker could use this issue to cause BusyBox to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2018-1000517)
It was discovered that the BusyBox DHCP utilities incorrectly handled
certain memory operations. A remote attacker could possibly use this issue
to access sensitive information. (CVE-2018-20679, CVE-2019-5747)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.10:
busybox 1:1.27.2-2ubuntu4.1
busybox-initramfs 1:1.27.2-2ubuntu4.1
busybox-static 1:1.27.2-2ubuntu4.1
udhcpc 1:1.27.2-2ubuntu4.1
udhcpd 1:1.27.2-2ubuntu4.1
Ubuntu 18.04 LTS:
busybox 1:1.27.2-2ubuntu3.2
busybox-initramfs 1:1.27.2-2ubuntu3.2
busybox-static 1:1.27.2-2ubuntu3.2
udhcpc 1:1.27.2-2ubuntu3.2
udhcpd 1:1.27.2-2ubuntu3.2
Ubuntu 16.04 LTS:
busybox 1:1.22.0-15ubuntu1.4
busybox-initramfs 1:1.22.0-15ubuntu1.4
busybox-static 1:1.22.0-15ubuntu1.4
udhcpc 1:1.22.0-15ubuntu1.4
udhcpd 1:1.22.0-15ubuntu1.4
Ubuntu 14.04 LTS:
busybox 1:1.21.0-1ubuntu1.4
busybox-initramfs 1:1.21.0-1ubuntu1.4
busybox-static 1:1.21.0-1ubuntu1.4
udhcpc 1:1.21.0-1ubuntu1.4
udhcpd 1:1.21.0-1ubuntu1.4
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3935-1
CVE-2011-5325, CVE-2014-9645, CVE-2015-9261, CVE-2016-2147,
CVE-2016-2148, CVE-2017-15873, CVE-2017-16544, CVE-2018-1000517,
CVE-2018-20679, CVE-2019-5747
Package Information:
https://launchpad.net/ubuntu/+source/busybox/1:1.27.2-2ubuntu4.1
https://launchpad.net/ubuntu/+source/busybox/1:1.27.2-2ubuntu3.2
https://launchpad.net/ubuntu/+source/busybox/1:1.22.0-15ubuntu1.4
https://launchpad.net/ubuntu/+source/busybox/1:1.21.0-1ubuntu1.4
