Vulnerability CVE-2018-7548
Published: 2018-02-27

Description:
In subst.c in zsh through 5.4.2, there is a NULL pointer dereference when using ${(PA)...} on an empty array result.

Type:

CWE-476

 (NULL Pointer Dereference)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Zsh project -> ZSH 
ZSH -> ZSH 
Canonical -> Ubuntu linux 

 References:
https://security.gentoo.org/glsa/201805-10
https://sourceforge.net/p/zsh/code/ci/110b13e1090bc31ac1352b28adc2d02b6d25a102
https://usn.ubuntu.com/3593-1/
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