Bug 1635888 (CVE-2018-17828)

Summary:	CVE-2018-17828 zziplib: directory traversal in unzzip_cat in the bins/unzzipcat-mem.c
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abokovoy, jamartis
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	It was discovered that zziplib is vulnerable to a directory traversal flaw in most of its unzip binaries, including unzip-mem, unzzipcat-mem, unzzipcat-big, unzzipcat-mix, and unzzipcat-zip. An attacker may use this flaw to write files outside the intended target directory, overwriting existing files, or creating new ones.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-31 22:33:22 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:	1635889, 1635890, 1641635, 1772447, 1986843
Bug Blocks:	1635891

Description Laura Pardo 2018-10-03 20:36:19 UTC

A flaw was found in ZZIPlib 0.13.69. A directory traversal vulnerability allows attackers to overwrite arbitrary files via a .. (dot dot) in a zip file, because of the function unzzip_cat in the bins/unzzipcat-mem.c file. 


References:
https://github.com/gdraheim/zziplib/issues/62

Comment 1 Laura Pardo 2018-10-03 20:36:47 UTC

Created zziplib tracking bugs for this issue:

Affects: fedora-all [bug 1635889]

Comment 3 Riccardo Schirone 2018-10-22 11:13:12 UTC

Upstream patch:
https://github.com/gdraheim/zziplib/commit/f609ae8971f3c0ce64d38276b778001d0bbfc84b

Comment 4 Riccardo Schirone 2018-10-22 11:17:04 UTC

The same flaw is present in unzzipcat-big.c, unzzipcat-mix.c and unzzipcat-zip.c.

Comment 5 Riccardo Schirone 2018-10-22 11:46:14 UTC

The same problem is also present in unzip-mem.c.

Proposed patch for unzip-mem.c:
https://github.com/gdraheim/zziplib/files/2482517/patch.txt

Comment 8 errata-xmlrpc 2020-03-31 19:31:20 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1178 https://access.redhat.com/errata/RHSA-2020:1178

Comment 9 Product Security DevOps Team 2020-03-31 22:33:22 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-2018-17828

Comment 10 errata-xmlrpc 2020-04-28 15:36:52 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1653 https://access.redhat.com/errata/RHSA-2020:1653