[SECURITY] [DLA 2559-1] busybox security update

ID DEBIAN:DLA-2559-1:C6843
Type debian
Reporter Debian
Modified 2021-02-15T11:57:08


Debian LTS Advisory DLA-2559-1 debian-lts@lists.debian.org https://www.debian.org/lts/security/ Markus Koschany February 15, 2021 https://wiki.debian.org/LTS

Package : busybox Version : 1:1.22.0-19+deb9u1 CVE ID : CVE-2011-5325 CVE-2015-9261 CVE-2016-2147 CVE-2016-2148 CVE-2017-15873 CVE-2017-16544 CVE-2018-1000517 Debian Bug : 902724 882258 879732 818497 818499 803097 802702

Busybox, utility programs for small and embedded systems, was affected by several security vulnerabilities. The Common Vulnerabilities and Exposures project identifies the following issues.


A path traversal vulnerability was found in Busybox implementation
of tar. tar will extract a symlink that points outside of the
current working directory and then follow that symlink when
extracting other files. This allows for a directory traversal
attack when extracting untrusted tarballs.


When device node or symlink in /dev should be created inside
2-or-deeper subdirectory (/dev/dir1/dir2.../node), the intermediate
directories are created with incorrect permissions.


An integer overflow may occur when processing any variant of a

"literal run" in the lzo1x_decompress_safe function. Each of these three locations is subject to an integer overflow when processing zero bytes. This exposes the code that copies literals to memory corruption.


The add_probe function in modutils/modprobe.c in BusyBox allows
local users to bypass intended restrictions on loading kernel
modules via a / (slash) character in a module name, as demonstrated
by an "ifconfig /usbserial up" command or a "mount -t /snd_pcm none
/" command.


Integer overflow in the DHCP client (udhcpc) in BusyBox allows
remote attackers to cause a denial of service (crash) via a
malformed RFC1035-encoded domain name, which triggers an
out-of-bounds heap write.


Heap-based buffer overflow in the DHCP client (udhcpc) in BusyBox
allows remote attackers to have unspecified impact via vectors
involving OPTION_6RD parsing.


The get_next_block function in archival/libarchive
/decompress_bunzip2.c in BusyBox has an Integer Overflow that may
lead to a write access violation.


In the add_match function in libbb/lineedit.c in BusyBox, the tab
autocomplete feature of the shell, used to get a list of filenames
in a directory, does not sanitize filenames and results in executing
any escape sequence in the terminal. This could potentially result
in code execution, arbitrary file writes, or other attacks.


BusyBox contains a Buffer Overflow vulnerability in
Busybox wget that can result in a heap-based buffer overflow.
This attack appears to be exploitable via network connectivity.


Unziping a specially crafted zip file results in a computation of an
invalid pointer and a crash reading an invalid address.

For Debian 9 stretch, these problems have been fixed in version 1:1.22.0-19+deb9u1.

We recommend that you upgrade your busybox packages.

For the detailed security status of busybox please refer to its security tracker page at: https://security-tracker.debian.org/tracker/busybox

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS