ASA-201804-7 log original external raw
[ASA-201804-7] zsh: denial of service |
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Arch Linux Security Advisory ASA-201804-7
=========================================
Severity: Medium
Date : 2018-04-19
CVE-ID : CVE-2018-7548 CVE-2018-7549
Package : zsh
Type : denial of service
Remote : No
Link : https://security.archlinux.org/AVG-642
Summary
=======
The package zsh before version 5.5-1 is vulnerable to denial of
service.
Resolution
==========
Upgrade to 5.5-1.
# pacman -Syu "zsh>=5.5-1"
The problems have been fixed upstream in version 5.5.
Workaround
==========
None.
Description
===========
- CVE-2018-7548 (denial of service)
In subst.c in zsh through 5.4.2, there is a NULL pointer dereference
when using ${(PA)...} on an empty array result.
- CVE-2018-7549 (denial of service)
In params.c in zsh through 5.4.2, there is a crash during a copy of an
empty hash table, as demonstrated by typeset -p.
Impact
======
A local attacker can cause a denial of service via a specially input.
References
==========
https://sourceforge.net/p/zsh/code/ci/110b13e1090bc31ac1352b28adc2d02b6d25a102
https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd
https://security.archlinux.org/CVE-2018-7548
https://security.archlinux.org/CVE-2018-7549
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