[USN-5179-1] BusyBox vulnerabilities

========================================================================== Ubuntu Security Notice USN-5179-1 December 07, 2021
busybox vulnerabilities ==========================================================================
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: 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: launchpad.net/ubuntu/+source/busybox/1:1.30.1-6ubuntu3.1 launchpad.net/ubuntu/+source/busybox/1:1.30.1-6ubuntu2.1 launchpad.net/ubuntu/+source/busybox/1:1.30.1-4ubuntu6.4 launchpad.net/ubuntu/+source/busybox/1:1.27.2-2ubuntu3.4