Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 533
Alerts This Week
Warning Icon 1 533

Ubuntu 18.04 LTS: USN-5259-2 Critical: Cron Privilege Escalation and DoS

ubuntu
Calendar Grey May 6, 2022
Dist Ubuntu Esm H88
Ubuntu Security Advisory USN-5260-3 tackles severe issues in the SSH service that impact user access and system integrity.
Several security issues were fixed in Cron.

Summary

Several security issues were fixed in Cron.

Software Description:

- cron: process scheduling daemon

Details:

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 vu...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu critical severity cron

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
   cron                            3.0pl1-128.1ubuntu1.1

In general, a standard system update will make all the necessary changes.

References

  https://ubuntu.com/security/notices/USN-5259-2

  https://ubuntu.com/security/notices/USN-5259-1

  CVE-2017-9525, CVE-2019-9704, CVE-2019-9705, CVE-2019-9706

Severity
critical
Lowest
Low
Medium
High
Critical

May 06, 2022

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu critical severity cron

Package Information

  https://launchpad.net/ubuntu/+source/cron/3.0pl1-128.1ubuntu1.1

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.