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Debian DLA-2801-1 : cron - LTS security update
medium Nessus Plugin ID 154747
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Synopsis
The remote Debian host is missing one or more security-related updates.Description
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.
Solution
Upgrade the cron packages.For Debian 9 stretch, these problems have been fixed in version 3.0pl1-128+deb9u2.
See Also
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=809167
https://security-tracker.debian.org/tracker/source-package/cron
https://www.debian.org/lts/security/2021/dla-2801
https://security-tracker.debian.org/tracker/CVE-2017-9525
https://security-tracker.debian.org/tracker/CVE-2019-9704
https://security-tracker.debian.org/tracker/CVE-2019-9705
Plugin Details
Severity: Medium
ID: 154747
File Name: debian_DLA-2801.nasl
Version: 1.3
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 10/30/2021
Updated: 11/27/2023
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: Medium
Base Score: 6.9
Temporal Score: 5.4
Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2017-9525
CVSS v3
Risk Factor: Medium
Base Score: 6.7
Temporal Score: 6
Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:cron
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 10/30/2021
Vulnerability Publication Date: 12/27/2015
Reference Information
CVE: CVE-2017-9525, CVE-2019-9704, CVE-2019-9705, CVE-2019-9706