Bug 1626187 (CVE-2018-0502)

Summary:	CVE-2018-0502 zsh: Improper parsing of the shebang line with special chars
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dmaphy, james.antill, j, kdudka, svashisht
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	zsh 5.6	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-10-05 09:46:37 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:	1626190, 1626191
Bug Blocks:	1626189

Description Pedro Sampaio 2018-09-06 17:28:17 UTC

An issue was discovered in zsh before 5.6. The beginning of a #! script file was mishandled, potentially leading to an execve call to a program named on the second line.

Upstream patch:

https://sourceforge.net/p/zsh/code/ci/1c4c7b6a4d17294df028322b70c53803a402233d

References:

https://www.zsh.org/mla/zsh-announce/136

Comment 1 Pedro Sampaio 2018-09-06 17:29:52 UTC

Created zsh tracking bugs for this issue:

Affects: fedora-all [bug 1626190]

Comment 3 Riccardo Schirone 2018-10-05 09:46:37 UTC

Closing this as NOTABUG and asked to MITRE to reject the CVE. Executing the second line of a script is not a security issue, since in the moment you execute a script you already expect all commands inside it to be executed.

Comment 4 Doran Moppert 2020-02-11 00:31:20 UTC

Statement:

Red Hat Product Security determined that this flaw was not a security vulnerability. See the Bugzilla link for more details.