USN-5259-2

Dashboard / Vulnerabilities / USN-5259-2

USN-5259-2

Summary: cron vulnerabilities

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 vulnerability in its force_rescan_user function. An attacker could possibly use this issue to cause a denial of service. (CVE-2019-9706)

References: https://ubuntu.com/security/notices/USN-5259-2, https://ubuntu.com/security/CVE-2017-9525, https://ubuntu.com/security/CVE-2019-9704, https://ubuntu.com/security/CVE-2019-9705, https://ubuntu.com/security/CVE-2019-9706