USN-5259-3: Cron regression

23769

25 July 2022

25 July 2022

CLOSED

LOW

CVE-2017-9525

Severity

low

Vendor

VMware Tanzu

Versions Affected

  • Canonical Ubuntu 16.04
  • Canonical Ubuntu 18.04

Description

USN-5259-1 and USN-5259-2 fixed vulnerabilities in Cron. Unfortunately that update was incomplete and could introduce a regression. This update fixes the problem. We apologize for the inconvenience. Original advisory details: 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) Update Instructions: Run `sudo ua fix USN-5259-3` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: cron - 3.0pl1-128ubuntu2+esm2 Available with UA Infra or UA Desktop: https://ubuntu.com/advantage

CVEs contained in this USN include: CVE-2017-9525

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 prior to 2.7.45, or later versions with Xenial Stemcells prior to 456.265
    • 2.10.x versions prior to 2.10.25, or later versions with Xenial Stemcells prior to 621.241
    • 2.11.x versions prior to 2.11.14, or later versions with Xenial Stemcells prior to 621.241
    • 2.12.x versions prior to 2.12.8, or later versions with Xenial Stemcells prior to 621.241
  • Operations Manager
    • 2.9.x versions prior to 2.9.39
    • 2.10.x versions prior to 2.10.40
  • VMware Tanzu Application Service for VMs
    • 2.7.x versions prior to 2.7.50, or later versions with Xenial Stemcells prior to 456.265
    • 2.10.x versions prior to 2.10.32, or later versions with Xenial Stemcells prior to 621.241
    • 2.11.x versions prior to 2.11.20, or later versions with Xenial Stemcells prior to 621.241
    • 2.12.x versions prior to 2.12.13, or later versions with Xenial Stemcells prior to 621.241

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
    • 2.7.45, and upgrade Xenial Stemcells to 456.265 or greater
    • 2.10.25, and upgrade Xenial Stemcells to 621.241 or greater
    • 2.11.14, and upgrade Xenial Stemcells to 621.241 or greater
    • 2.12.8, and upgrade Xenial Stemcells to 621.241 or greater
  • Operations Manager
    • 2.9.39
    • 2.10.40
  • VMware Tanzu Application Service for VMs
    • 2.7.50, and upgrade Xenial Stemcells to 456.265 or greater
    • 2.10.32, and upgrade Xenial Stemcells to 621.241 or greater
    • 2.11.20, and upgrade Xenial Stemcells to 621.241 or greater
    • 2.12.13, and upgrade Xenial Stemcells to 621.241 or greater

References

History

2022-07-25: Initial vulnerability report published.