Debian LTS Advisory ([SECURITY] [DLA 1445-1] busybox security update)

Published: 2018-07-26 22:00:00
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:N/A:N

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

Affected Versions:
busybox on Debian Linux

Recommendations:
For Debian 8 'Jessie', these problems have been fixed in version 1:1.22.0-9+deb8u2. We recommend that you upgrade your busybox Linux Distribution Packages.

Summary:
Busybox, utility programs for small and embedded systems, was affected by several security vulnerabilities. The Common Vulnerabilities and Exposures project identifies the following issues. CVE-2011-5325 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. CVE-2013-1813 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. CVE-2014-4607 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. CVE-2014-9645 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. CVE-2016-2147 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. CVE-2016-2148 Heap-based buffer overflow in the DHCP client (udhcpc) in BusyBox allows remote attackers to have unspecified impact via vectors involving OPTION_6RD parsing. CVE-2017-15873 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. CVE-2017-16544 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. CVE-2018-1000517 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. CVE-2015-9621 Unziping a specially crafted zip file results in a computation of an invalid pointer and a crash reading an invalid address.

Detection Method:
This check tests the installed software version using the apt Linux Distribution Package manager.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2011-5325
https://nvd.nist.gov/vuln/detail/CVE-2013-1813
https://nvd.nist.gov/vuln/detail/CVE-2014-4607
https://nvd.nist.gov/vuln/detail/CVE-2014-9645
https://nvd.nist.gov/vuln/detail/CVE-2015-9261
https://nvd.nist.gov/vuln/detail/CVE-2015-9621
https://nvd.nist.gov/vuln/detail/CVE-2016-2147
https://nvd.nist.gov/vuln/detail/CVE-2016-2148
https://nvd.nist.gov/vuln/detail/CVE-2017-15873
https://nvd.nist.gov/vuln/detail/CVE-2017-16544
https://nvd.nist.gov/vuln/detail/CVE-2018-1000517

References:

https://lists.debian.org/debian-lts-announce/2018/07/msg00037.html

Severity
Medium
CVSS Score
5.0
Published
2018-07-26
Modified
2019-03-18
Category
Debian Local Security Checks

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