Bug 1831290 (CVE-2020-10870)

Summary:	CVE-2020-10870 zim: predictable temporary directory names allows users to cause denial of service
Product:	[Other] Security Response	Reporter:	msiddiqu
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	micah.roth, vitaly
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-05-04 22:31:48 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:	1831291
Bug Blocks:

Description msiddiqu 2020-05-04 19:43:20 UTC

Zim through 0.72.1 creates temporary directories with predictable names. A malicious user could predict and create Zim's temporary directories and prevent other users from being able to start Zim, resulting in a denial of service.

Upstream issue:

https://github.com/zim-desktop-wiki/zim-desktop-wiki/issues/1028

Upstream patch: 

https://github.com/mssalvatore/zim-desktop-wiki/commit/745bb80f081ee99569df57be30ed17e666510040

Comment 1 msiddiqu 2020-05-04 19:44:01 UTC

Created zimlib tracking bugs for this issue:

Affects: fedora-all [bug 1831291]

Comment 3 Product Security DevOps Team 2020-05-04 22:31:48 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.