All Vulnerability Reports

USN-5259-1: Cron vulnerabilities


Severity

Low

Vendor

VMware Tanzu

Versions Affected

  • Canonical Ubuntu 16.04

Description

It was discovered that the postinst maintainer script in Cron unsafely handled file permissions during package install or update operations. An attacker could possibly use this issue to perform a privilege escalation attack. (CVE-2017-9525) Florian Weimer discovered that Cron incorrectly handled certain memory operations during crontab file creation. An attacker could possibly use this issue to cause a denial of service. (CVE-2019-9704) It was discovered that Cron incorrectly handled user input during crontab file creation. An attacker could possibly use this issue to cause a denial of service. (CVE-2019-9705) It was discovered that Cron contained a use-after-free vulnerability in its force_rescan_user function. An attacker could possibly use this issue to cause a denial of service. (CVE-2019-9706)

CVEs contained in this USN include: CVE-2017-9525, CVE-2019-9704, CVE-2019-9705, CVE-2019-9706

Affected VMware Products and Versions

Severity is low unless otherwise noted.

  • Tanzu Greenplum for Kubernetes
    • All versions prior to 2.0.0
  • Isolation Segment
    • 2.7.x versions with Xenial Stemcells prior to 456.236
    • 2.8.x versions with Xenial Stemcells prior to 621.208
    • 2.9.x versions with Xenial Stemcells prior to 621.208
    • 2.10.x versions with Xenial Stemcells prior to 621.208
    • 2.11.x versions with Xenial Stemcells prior to 621.208
    • 2.12.x versions with Xenial Stemcells prior to 621.208
  • Operations Manager
    • 2.9.x versions prior to 2.9.30
    • 2.10.x versions prior to 2.10.29
  • VMware Tanzu Application Service for VMs
    • 2.7.x versions with Xenial Stemcells prior to 456.236
    • 2.8.x versions with Xenial Stemcells prior to 621.208
    • 2.9.x versions with Xenial Stemcells prior to 621.208
    • 2.10.x versions with Xenial Stemcells prior to 621.208
    • 2.11.x versions with Xenial Stemcells prior to 621.208
    • 2.12.x versions with Xenial Stemcells prior to 621.208

Mitigation

Users of affected products are strongly encouraged to follow the mitigation below. On the Tanzu Network product page for each release, check the Depends On section and/or Release Notes for this information. Releases that have fixed this issue include:

  • Tanzu Greenplum for Kubernetes
    • 2.0.0
  • Isolation Segment
    • 2.7.x: Upgrade Xenial Stemcells to 456.236 or greater
    • 2.8.x: Upgrade Xenial Stemcells to 621.208 or greater
    • 2.9.x: Upgrade Xenial Stemcells to 621.208 or greater
    • 2.10.x: Upgrade Xenial Stemcells to 621.208 or greater
    • 2.11.x: Upgrade Xenial Stemcells to 621.208 or greater
    • 2.12.x: Upgrade Xenial Stemcells to 621.208 or greater
  • Operations Manager
    • 2.9.30
    • 2.10.29
  • VMware Tanzu Application Service for VMs
    • 2.7.x: Upgrade Xenial Stemcells to 456.236 or greater
    • 2.8.x: Upgrade Xenial Stemcells to 621.208 or greater
    • 2.9.x: Upgrade Xenial Stemcells to 621.208 or greater
    • 2.10.x: Upgrade Xenial Stemcells to 621.208 or greater
    • 2.11.x: Upgrade Xenial Stemcells to 621.208 or greater
    • 2.12.x: Upgrade Xenial Stemcells to 621.208 or greater

References

History

2022-03-17: Initial vulnerability report published.