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Bug 1549841 - (CVE-2018-7548) CVE-2018-7548 zsh: null-pointer deref when using ${(PA)...} on an empty array result
CVE-2018-7548 zsh: null-pointer deref when using ${(PA)...} on an empty array...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20170324,reported=2...
: Security
Depends On: 1549842 1549843
Blocks: 1549839
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Reported: 2018-02-27 16:18 EST by Laura Pardo
Modified: 2018-04-24 17:21 EDT (History)
5 users (show)

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Fixed In Version: zsh 5.5
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Description Laura Pardo 2018-02-27 16:18:08 EST 
A flaw was found in zsh prior 5.4.2. There is a null-pointer deref when using ${(PA)...} on an empty array result.


References:
https://sourceforge.net/p/zsh/code/ci/110b13e1090bc31ac1352b28adc2d02b6d25a102
Comment 1 Laura Pardo 2018-02-27 16:18:50 EST 
Created zsh tracking bugs for this issue:

Affects: fedora-all [bug 1549842]
Comment 3 Kamil Dudka 2018-03-06 09:02:20 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.
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