USN-4968-1: LZ4 vulnerability | Cloud Foundry


## Severity Medium ## Vendor Canonical Ubuntu ## Versions Affected * Canonical Ubuntu 18.04 ## Description It was discovered that LZ4 incorrectly handled certain memory operations. If a user or automated system were tricked into uncompressing a specially- crafted LZ4 file, a remote attacker could use this issue to cause LZ4 to crash, resulting in a denial of service, or possibly execute arbitrary code. CVEs contained in this USN include: CVE-2021-3520. ## Affected Cloud Foundry Products and Versions _Severity is medium unless otherwise noted._ * Bionic Stemcells * 1.x versions prior to 1.10 * All other stemcells not listed. * cflinuxfs3 * All versions prior to 0.240.0 * CF Deployment * All versions prior to 16.15.0 ## 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 1.x versions to 1.10 or greater * All other stemcells should be upgraded to the latest version available on [bosh.io](<https://bosh.io/stemcells>). * cflinuxfs3 * Upgrade all versions to 0.240.0 or greater * CF Deployment * Upgrade all versions to 16.15.0 or greater ## References * [USN Notice](<https://usn.ubuntu.com/4968-1/>) * [CVE-2021-3520](<https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3520>) ## History 2021-06-11: Initial vulnerability report published.

Affected Software

CPE Name Name Version
bionic stemcells 1.10
cflinuxfs3 0.240.0
cf deployment 16.15.0