Bug 1549858 (CVE-2018-7549)

Summary:	CVE-2018-7549 zsh: crash on copying empty hash table
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dmaphy, james.antill, j, kdudka, rcosta, svashisht
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	zsh 5.5	Doc Type:	If docs needed, set a value
Doc Text:	A NULL pointer dereference flaw was found in the code responsible for saving hashtables of the zsh package. An attacker could use this flaw to cause a denial of service by crashing the user shell.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-11-30 00:26:06 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:	1549859, 1571512, 1571513
Bug Blocks:	1549839

Description Laura Pardo 2018-02-27 22:20:53 UTC

A flaw was found in zsh prior 5.4.2. There is a crash when copying empty hash table with typeset -p.


Resources:
https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd

Comment 2 Kamil Dudka 2018-03-06 14:04:15 UTC

(In reply to Laura Pardo from comment #0)
> A flaw was found in zsh prior 5.4.2.

The commit you refer to landed _after_ the 5.4.2 release of zsh and it has not been included in any stable release of zsh yet.

Comment 5 errata-xmlrpc 2018-10-30 07:30:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3073 https://access.redhat.com/errata/RHSA-2018:3073