USN-5179-1: BusyBox vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Description

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)

CVEs contained in this USN include: 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.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • Only unsupported release lines of this product are affected
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.269.0
• CF Deployment
  • All versions prior to 17.1.0

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

• Bionic Stemcells
  • Upgrade to 1.1 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.269.0 or greater
• CF Deployment
  • Upgrade all versions to 17.1.0 or greater

History

2022-01-20: Initial vulnerability report published.