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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --9M6zSbkPlsw80Uhs23QmjKQTsjeYVXrbm Content-Type: multipart/mixed; boundary="Hm4nYZHZEZVDoUGhYpEX9BSCuQZE4Ygid"; protected-headers="v1" From: Marc Deslauriers <marc.deslauriers@canonical.com> Reply-To: Ubuntu Security <security@ubuntu.com> To: "ubuntu-security-announce@lists.ubuntu.com" <ubuntu-security-announce@lists.ubuntu.com> Message-ID: <5cacdbce-498d-e334-d055-f9dca1879ba8@canonical.com> Subject: [USN-3935-1] BusyBox vulnerabilities
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========================================================================== 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
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