Vixie Cron before the 3.0pl1-133 Debian package allows local users to cause a denial of service (daemon crash) via a large crontab file because the calloc return value is not checked.

The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5259-2 advisory.

  - In the cron package through 3.0pl1-128 on Debian, and through 3.0pl1-128ubuntu2 on Ubuntu, the postinst     maintainer script allows for group-crontab-to-root privilege escalation via symlink attacks against unsafe     usage of the chown and chmod programs. (CVE-2017-9525)

  - Vixie Cron before the 3.0pl1-133 Debian package 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)

  - 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. (CVE-2019-9705)

  - Vixie Cron before the 3.0pl1-133 Debian package allows local users to cause a denial of service (use-     after-free and daemon crash) because of a force_rescan_user error. (CVE-2019-9706)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5259-1 advisory.

  - In the cron package through 3.0pl1-128 on Debian, and through 3.0pl1-128ubuntu2 on Ubuntu, the postinst     maintainer script allows for group-crontab-to-root privilege escalation via symlink attacks against unsafe     usage of the chown and chmod programs. (CVE-2017-9525)

  - Vixie Cron before the 3.0pl1-133 Debian package 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)

  - 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. (CVE-2019-9705)

  - Vixie Cron before the 3.0pl1-133 Debian package allows local users to cause a denial of service (use-     after-free and daemon crash) because of a force_rescan_user error. (CVE-2019-9706)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-2801 advisory.

  - In the cron package through 3.0pl1-128 on Debian, and through 3.0pl1-128ubuntu2 on Ubuntu, the postinst     maintainer script allows for group-crontab-to-root privilege escalation via symlink attacks against unsafe     usage of the chown and chmod programs. (CVE-2017-9525)

  - Vixie Cron before the 3.0pl1-133 Debian package 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)

  - 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. (CVE-2019-9705)

  - Vixie Cron before the 3.0pl1-133 Debian package allows local users to cause a denial of service (use-     after-free and daemon crash) because of a force_rescan_user error. (CVE-2019-9706)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the cronie packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - 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.(CVE-2019-9705)

  - Vixie Cron before the 3.0pl1-133 Debian package 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)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the cronie packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - 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.(CVE-2019-9705)

  - Vixie Cron before the 3.0pl1-133 Debian package 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)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the cronie packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - Vixie Cron before the 3.0pl1-133 Debian package 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)

  - 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.(CVE-2019-9705)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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.

Minor security and bugfix update to version 1.5.4.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Various security problems have been discovered in Debian's CRON scheduler.

CVE-2017-9525

Fix group crontab to root escalation via the Debian package's postinst script as described by Alexander Peslyak (Solar Designer) in http://www.openwall.com/lists/oss-security/2017/06/08/3

CVE-2019-9704

DoS: Fix unchecked return of calloc(). Florian Weimer discovered that a missing check for the return value of calloc() could crash the daemon, which could be triggered by a very large crontab created by a user.

CVE-2019-9705

Enforce maximum crontab line count of 1000 to prevent a malicious user from creating an excessivly large crontab. The daemon will log a warning for existing files, and crontab(1) will refuse to create new ones.

CVE-2019-9706

A user reported a use-after-free condition in the cron daemon, leading to a possible denial of service scenario by crashing the daemon. 

For Debian 8 'Jessie', these problems have been fixed in version 3.0pl1-127+deb8u2.

We recommend that you upgrade your cron packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
160668	Ubuntu 18.04 LTS : Cron vulnerabilities (USN-5259-2)	Nessus	Ubuntu Local Security Checks	medium
157299	Ubuntu 16.04 ESM : Cron vulnerabilities (USN-5259-1)	Nessus	Ubuntu Local Security Checks	medium
154747	Debian DLA-2801-1 : cron - LTS security update	Nessus	Debian Local Security Checks	medium
135630	EulerOS Virtualization 3.0.2.2 : cronie (EulerOS-SA-2020-1468)	Nessus	Huawei Local Security Checks	medium
132823	EulerOS Virtualization for ARM 64 3.0.5.0 : cronie (EulerOS-SA-2020-1069)	Nessus	Huawei Local Security Checks	medium
132281	EulerOS 2.0 SP3 : cronie (EulerOS-SA-2019-2564)	Nessus	Huawei Local Security Checks	medium
131649	EulerOS 2.0 SP2 : cronie (EulerOS-SA-2019-2496)	Nessus	Huawei Local Security Checks	medium
130809	EulerOS 2.0 SP8 : cronie (EulerOS-SA-2019-2100)	Nessus	Huawei Local Security Checks	medium
128936	EulerOS Virtualization for ARM 64 3.0.2.0 : cronie (EulerOS-SA-2019-1933)	Nessus	Huawei Local Security Checks	medium
128816	EulerOS 2.0 SP5 : cronie (EulerOS-SA-2019-1893)	Nessus	Huawei Local Security Checks	medium
127092	SUSE SLED12 / SLES12 Security Update : cronie (SUSE-SU-2019:1990-1)	Nessus	SuSE Local Security Checks	medium
126496	SUSE SLED15 / SLES15 Security Update : cronie (SUSE-SU-2019:1389-2)	Nessus	SuSE Local Security Checks	medium
125758	openSUSE Security Update : cronie (openSUSE-2019-1520)	Nessus	SuSE Local Security Checks	medium
125673	SUSE SLED15 / SLES15 Security Update : cronie (SUSE-SU-2019:1389-1)	Nessus	SuSE Local Security Checks	medium
124499	Fedora 30 : cronie (2019-676e120269)	Nessus	Fedora Local Security Checks	medium
123017	Debian DLA-1723-1 : cron security update	Nessus	Debian Local Security Checks	medium
122981	Fedora 29 : cronie (2019-7104a00054)	Nessus	Fedora Local Security Checks	medium

Detections

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CVE-2019-9704

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Tenable Plugins

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