Severity

low

Vendor

VMware Tanzu

Versions Affected

• Canonical Ubuntu 18.04

Description

USN-5259-1 fixed several vulnerabilities in Cron. This update provides the corresponding update for Ubuntu 18.04 LTS. 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-5259-2` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: cron - 3.0pl1-128.1ubuntu1.1 No subscription required

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.

• Isolation Segment
  • 2.7.x versions prior to 2.7.45
  • 2.10.x versions prior to 2.10.25
  • 2.11.x versions prior to 2.11.14
  • 2.12.x versions prior to 2.12.8
• VMware Tanzu Application Service for VMs
  • 2.7.x versions prior to 2.7.50
  • 2.10.x versions prior to 2.10.32
  • 2.11.x versions prior to 2.11.20
  • 2.12.x versions prior to 2.12.13

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:

• Isolation Segment
  • 2.7.45
  • 2.10.25
  • 2.11.14
  • 2.12.8
• VMware Tanzu Application Service for VMs
  • 2.7.50
  • 2.10.32
  • 2.11.20
  • 2.12.13

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9525
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9704
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9705
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9706
• https://ubuntu.com/security/notices/USN-5259-2
• https://cloudfoundry.org/blog/usn-5259-2

History

2022-07-25: Initial vulnerability report published.