A BusyBox security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, 21.04, and 21.10.
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Ubuntu Security Notice USN-5179-1
December 07, 2021
busybox vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in BusyBox.
Software Description:
- busybox: Tiny utilities for small and embedded systems
Details:
It was discovered that BusyBox incorrectly handled certain malformed gzip
archives. If a user or automated system were tricked into processing a
specially crafted gzip archive, a remote attacker could use this issue to
cause BusyBox to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2021-28831)
It was discovered that BusyBox incorrectly handled certain malformed LZMA
archives. If a user or automated system were tricked into processing a
specially crafted LZMA archive, a remote attacker could use this issue to
cause BusyBox to crash, resulting in a denial of service, or possibly
leak sensitive information. (CVE-2021-42374)
Vera Mens, Uri Katz, Tal Keren, Sharon Brizinov, and Shachar Menashe
discovered that BusyBox incorrectly handled certain awk patterns. If a user
or automated system were tricked into processing a specially crafted awk
pattern, a remote attacker could use this issue to cause BusyBox to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2021-42378, CVE-2021-42379, CVE-2021-42380, CVE-2021-42381,
CVE-2021-42382, CVE-2021-42384, CVE-2021-42385, CVE-2021-42386)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 21.10:
busybox 1:1.30.1-6ubuntu3.1
busybox-initramfs 1:1.30.1-6ubuntu3.1
busybox-static 1:1.30.1-6ubuntu3.1
Ubuntu 21.04:
busybox 1:1.30.1-6ubuntu2.1
busybox-initramfs 1:1.30.1-6ubuntu2.1
busybox-static 1:1.30.1-6ubuntu2.1
Ubuntu 20.04 LTS:
busybox 1:1.30.1-4ubuntu6.4
busybox-initramfs 1:1.30.1-4ubuntu6.4
busybox-static 1:1.30.1-4ubuntu6.4
Ubuntu 18.04 LTS:
busybox 1:1.27.2-2ubuntu3.4
busybox-initramfs 1:1.27.2-2ubuntu3.4
busybox-static 1:1.27.2-2ubuntu3.4
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5179-1
CVE-2021-28831, CVE-2021-42374, CVE-2021-42378, CVE-2021-42379,
CVE-2021-42380, CVE-2021-42381, CVE-2021-42382, CVE-2021-42384,
CVE-2021-42385, CVE-2021-42386
Package Information:
https://launchpad.net/ubuntu/+source/busybox/1:1.30.1-6ubuntu3.1
https://launchpad.net/ubuntu/+source/busybox/1:1.30.1-6ubuntu2.1
https://launchpad.net/ubuntu/+source/busybox/1:1.30.1-4ubuntu6.4
https://launchpad.net/ubuntu/+source/busybox/1:1.27.2-2ubuntu3.4
