Bug 1270816 (CVE-2015-7758)

Summary:	CVE-2015-7758 gummi: Use of predictable filenames in /tmp
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	mail
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-04-02 09:29:19 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:	1270817
Bug Blocks:

Description Adam Mariš 2015-10-12 12:49:36 UTC

A vulnerability in gummi was found that uses predictable filenames in /tmp based on basename. When multiple users opens file with the same name, they could write to the same file. Attacker could also create symlinks such that the users could unintentionally overwrite some of their files. Although this case of attack depends on the configuration of /proc/sys/fs/protected_symlinks.

CVE assignment:

http://seclists.org/oss-sec/2015/q4/51

Comment 1 Adam Mariš 2015-10-12 12:49:57 UTC

Created gummi tracking bugs for this issue:

Affects: fedora-all [bug 1270817]

Comment 2 Fabian Affolter 2015-10-30 13:06:51 UTC

Upstream bug report: https://github.com/alexandervdm/gummi/issues/20

Comment 3 Fedora Update System 2016-03-09 15:55:46 UTC

gummi-0.6.6-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2016-03-09 16:23:15 UTC

gummi-0.6.6-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2016-03-09 20:12:58 UTC

gummi-0.6.6-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2016-03-09 20:14:19 UTC

gummi-0.6.6-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.