CVE-2019-9705

Vixie Cron before the 3.0pl1-133 Debian package allows local users to cause a denial of service (memory consumption) via a large crontab file because an unlimited number of lines is accepted.

Updated cronie packages fix security vulnerabilities:

Cronie before 1.5.3 allows local users to cause a denial of service (daemon crash) via a large crontab file because the calloc return value is not checked (CVE-2019-9704).

Cronie before 1.5.3 allows local users to cause a denial of service (memory consumption) via a large crontab file because an unlimited number of lines is accepted (CVE-2019-9705).

This update for cronie fixes the following issues:

Security issues fixed:

• CVE-2019-9704: Fixed an insufficient check in the return value of calloc which could allow a local user to create Denial of Service by crashing the daemon (bsc#1128937).
• CVE-2019-9705: Fixed an implementation vulnerability which could allow a local user to exhaust the memory resulting in Denial of Service (bsc#1128935).

Bug fixes:

• Manual start of cron is possible even when it's already started using systemd (bsc#1133100).
• Cron schedules only one job of crontab (bsc#1130746).

This update was imported from the SUSE:SLE-15:Update update project.

This update for cronie fixes the following issues:

Security issues fixed:

• CVE-2019-9704: Fixed an insufficient check in the return value of calloc which could allow a local user to create Denial of Service by crashing the daemon (bsc#1128937).
• CVE-2019-9705: Fixed an implementation vulnerability which could allow a local user to exhaust the memory resulting in Denial of Service (bsc#1128935).

Bug fixes:

• Manual start of cron is possible even when it's already started using systemd (bsc#1133100).
• Cron schedules only one job of crontab (bsc#1130746).

This update for cronie fixes the following issues:

Security issues fixed:

• CVE-2019-9704: Fixed an insufficient check in the return value of calloc which could allow a local user to create Denial of Service by crashing the daemon (bsc#1128937).
• CVE-2019-9705: Fixed an implementation vulnerability which could allow a local user to exhaust the memory resulting in Denial of Service (bsc#1128935).

Bug fixes:

• Manual start of cron is possible even when it's already started using systemd (bsc#1133100).
• Cron schedules only one job of crontab (bsc#1130746).

This update for cronie fixes the following issues:

Security issues fixed:

• CVE-2019-9704: Fixed an insufficient check in the return value of calloc which could allow a local user to create Denial of Service by crashing the deamon (bsc#1128937).
• CVE-2019-9705: Fixed an implementation vulnerability which could allow a local user to exhaust the memory resulting in Denial of Service (bsc#1128935).

Bug fixes:

• Manual start of cron is possible even when it's already started using systemd (bsc#1133100).
• Cron schedules only one job of crontab (bsc#1130746).

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)

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)