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AUSCERT External Security Bulletin Redistribution
ESB-2019.1136
USN-3935-1: BusyBox vulnerabilities
4 April 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: BusyBox
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Execute Arbitrary Code/Commands -- Remote with User Interaction
Modify Arbitrary Files -- Remote with User Interaction
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-5747 CVE-2018-1000517 CVE-2018-20679
CVE-2017-16544 CVE-2017-15873 CVE-2016-2148
CVE-2016-2147 CVE-2015-9261 CVE-2014-9645
CVE-2011-5325
Reference: ESB-2019.0594
ESB-2017.0518
ESB-2016.2783
ESB-2018.2183.3
Original Bulletin:
https://usn.ubuntu.com/3935-1/
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USN-3935-1: BusyBox vulnerabilities
3 April 2019
busybox vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 18.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 LTS
Summary
Several security issues were fixed in BusyBox.
Software Description
o 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
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o CVE-2011-5325
o CVE-2014-9645
o CVE-2015-9261
o CVE-2016-2147
o CVE-2016-2148
o CVE-2017-15873
o CVE-2017-16544
o CVE-2018-1000517
o CVE-2018-20679
o CVE-2019-5747
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