Bug 1549858 – CVE-2018-7549 zsh: crash on copying empty hash table

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Bug 1549858 - (CVE-2018-7549) CVE-2018-7549 zsh: crash on copying empty hash table

Summary:	CVE-2018-7549 zsh: crash on copying empty hash table

Status:	NEW

Aliases:	CVE-2018-7549

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20171222,reported=2...
Keywords:	Security

Depends On:	1549859 1571512 1571513
Blocks:	1549839
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Reported:	2018-02-27 17:20 EST by Laura Pardo
Modified:	2018-10-30 03:30 EDT (History)
CC List:	5 users (show)

See Also:
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:	---
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Last Closed:
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Regression:	---
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CRM:
Verified Versions:
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:3073	None	None	None	2018-10-30 03:30 EDT

Groups: None (edit)

Description Laura Pardo 2018-02-27 17:20:53 EST

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 09:04:15 EST

(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 03:30:03 EDT

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

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