CVE-2019-9704: Null Pointer Dereference
First published: Tue Mar 12 2019(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cron project Cron | <3.0pl1-133 | |
| Fedoraproject Fedora | =29 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 |
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Reference Links
- http://www.securityfocus.com/bid/107373
- https://lists.debian.org/debian-lts-announce/2019/03/msg00025.html
- https://lists.debian.org/debian-lts-announce/2021/10/msg00029.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6DU7HAUAQR4E4AEBPYLUV6FZ4PHKH6A2/
- https://salsa.debian.org/debian/cron/commit/f2525567
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6DU7HAUAQR4E4AEBPYLUV6FZ4PHKH6A2/
Frequently Asked Questions
What is the severity of CVE-2019-9704?
CVE-2019-9704 is classified as a medium severity vulnerability due to its potential to cause denial of service.
How do I fix CVE-2019-9704?
To fix CVE-2019-9704, upgrade to a version of Vixie Cron that is 3.0pl1-133 or later.
What systems are affected by CVE-2019-9704?
CVE-2019-9704 affects Vixie Cron versions prior to 3.0pl1-133, specifically on Debian 8.0, Debian 9.0, and Fedora 29.
What type of attack does CVE-2019-9704 facilitate?
CVE-2019-9704 allows local users to execute a denial of service attack by crashing the cron daemon.
How can I identify if my system is vulnerable to CVE-2019-9704?
You can determine if your system is vulnerable to CVE-2019-9704 by checking the version of Vixie Cron installed on your system.
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/weakness
- agent/remedy
- agent/references
- agent/first-publish-date
- agent/description
- agent/author
- agent/last-modified-date
- agent/event
- agent/source
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- vendor/cron project
- canonical/cron project cron
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/29
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- version/debian debian linux/9.0
- canonical/fedora
- version/fedora/29
- canonical/debian
- version/debian/8.0
- version/debian/9.0