Bug 1209501 (CVE-2015-8860)

Summary:	CVE-2015-8860 nodejs-tar: insecure processing of symbolic links during package processing
Product:	[Other] Security Response	Reporter:	Vasyl Kaigorodov <vkaigoro>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jorton, mmaslano, tchollingsworth, thrcka
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	npm 2.7.5, tar@nodejs 2.0.0	Doc Type:	Bug Fix
Doc Text:	A flaw was found in the way nodejs-tar, a Node.js module for reading and writing of tar archives, handled symbolic links when processing NPM packages. An attacker could potentially use this flaw to rewrite arbitrary files on the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-21 00:44:07 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:	1209503, 1209504
Bug Blocks:	1209502

Description Vasyl Kaigorodov 2015-04-07 13:49:22 UTC

A flaw was found in the way nodejs-tar, a Node.js module for reading and writing of tar archives, handled symbolic links when processing npm packages. An attacker could potentially use this flaw to rewrite arbitrary files on the system.

The fix normalizes symbolic links that point to targets outside the extraction root. This prevents packages containing symbolic links from overwriting targets outside the expected paths for a package.

Upstream announcement: https://github.com/npm/npm/releases/tag/v2.7.5
Upstream fix: https://github.com/npm/npm/commit/300834e91a4e2a95fb7fb59c309e7c3fc91d2312

Comment 1 Vasyl Kaigorodov 2015-04-07 13:51:37 UTC

Created nodejs-tar tracking bugs for this issue:

Affects: fedora-all [bug 1209503]
Affects: epel-all [bug 1209504]

Comment 3 Ján Rusnačko 2015-04-14 11:41:05 UTC

Upstream commits:

https://github.com/npm/node-tar/commit/a5337a6cd58a2d800fc03b3781a25751cf459f28
https://github.com/npm/node-tar/commit/5e6356e0ca256cba659ff24d0befbfe753a04cb6

Comment 4 Andrej Nemec 2016-04-21 12:00:18 UTC

CVE assignment:

http://seclists.org/oss-sec/2016/q2/122

External references:

https://nodesecurity.io/advisories/57