Bug 1557382 – CVE-2018-1083 zsh: Stack-based buffer overflow in gen_matches_files() at compctl.c

Bugzilla will be upgraded to version 5.0 on a still to be determined date in the near future. The original upgrade date has been delayed.

Bug 1557382 - (CVE-2018-1083) CVE-2018-1083 zsh: Stack-based buffer overflow in gen_matches_files() at compctl.c

Summary:	CVE-2018-1083 zsh: Stack-based buffer overflow in gen_matches_files() at comp...

Status:	NEW

Aliases:	CVE-2018-1083

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

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

URL:
Whiteboard:	impact=moderate,public=20180326,repor...
Keywords:	Security

Depends On:	1560702 1560696 1560697 1560700 1560701
Blocks:	1557385
	Show dependency tree / graph

Reported:	2018-03-16 10:01 EDT by Pedro Sampaio
Modified:	2018-10-30 03:30 EDT (History)
CC List:	7 users (show)

See Also:
Fixed In Version:	zsh 5.5
Doc Type:	If docs needed, set a value
Doc Text:	A buffer overflow flaw was found in the zsh shell auto-complete functionality. A local, unprivileged user can create a specially crafted directory path which leads to code execution in the context of the user who tries to use auto-complete to traverse the before mentioned path. If the user affected is privileged, this leads to privilege escalation.
Story Points:	---
Clone Of:
Environment:
Last Closed:
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:1932	None	None	None	2018-06-19 00:56 EDT
Red Hat Product Errata	RHSA-2018:3073	None	None	None	2018-10-30 03:30 EDT

Groups: None (edit)

Description Pedro Sampaio 2018-03-16 10:01:25 EDT

zsh is vulnerable to a stack-based buffer overflow in the gen_matches_files() function. A local attacker could exploit this through tab completion of directories with long names leading to arbitrary code execution.

Comment 8 Sam Fowler 2018-03-25 22:53:27 EDT

Upstream Patch:

https://sourceforge.net/p/zsh/code/ci/259ac472eac291c8c103c7a0d8a4eaf3c2942ed7

Comment 9 Richard Maciel Costa 2018-03-26 15:10:55 EDT

Created zsh tracking bugs for this issue:

Affects: fedora-all [bug 1560696]

Comment 12 Richard Maciel Costa 2018-05-25 09:13:45 EDT

Acknowledgments:

Name: Richard Maciel Costa (Red Hat)

Comment 13 errata-xmlrpc 2018-06-19 00:56:26 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:1932 https://access.redhat.com/errata/RHSA-2018:1932

Comment 14 errata-xmlrpc 2018-10-30 03:30:20 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

Note You need to log in before you can comment on or make changes to this bug.