USN-5259-2: Cron vulnerabilities
24068
25 July 2022
25 July 2022
CLOSED
LOW
CVE-2017-9525,CVE-2019-9704,CVE-2019-9705,CVE-2019-9706
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.