Bug 1687688 (CVE-2019-9704)

Summary: CVE-2019-9704 vixie-cron: calloc return value resulting in remote dos
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: mplch, tmraz
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: cron 3.0pl1-133, cronie 1.5.3 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the Vixie Cron package, caused by improper validation of the return value from the calloc function. A local attacker could exploit this flaw by using a specially crafted crontab file, resulting in a denial of service condition and potentially crashing the service.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2020-04-22 04:32:22 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1699088, 1699089    
Bug Blocks: 1696266    

Description Dhananjay Arunesh 2019-03-12 07:20:54 UTC 
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.

Upstream commit:
https://salsa.debian.org/debian/cron/commit/f2525567
Comment 1 Tomas Mraz 2019-03-15 13:54:33 UTC 
In cronie handled in cronie-1.5.3 release.
Comment 3 Scott Gayou 2019-04-10 18:53:57 UTC 
Also fixed upstream in cronie here:
https://github.com/cronie-crond/cronie/commit/a6576769f01325303b11edc3e0cfb05ef382ce56
Comment 5 Scott Gayou 2019-04-17 18:15:56 UTC 
Upstream Cronie fix is in release 1.5.3.
Comment 8 Product Security DevOps Team 2020-04-22 04:32:22 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-9704