CVE-2018-7548

In subst.c in zsh through 5.4.2, there is a NULL pointer dereference when using ${(PA)...} on an empty array result.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 45%
VendorProductVersion
zshzsh
𝑥
≤ 5.4.2
canonicalubuntu_linux
17.10
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
zsh
bullseye (security)
5.8-6+deb11u1
fixed
bullseye
5.8-6+deb11u1
fixed
bookworm
5.9-4
fixed
sid
5.9-8
fixed
trixie
5.9-8
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
zsh
artful
Fixed 5.2-5ubuntu1.1
released
xenial
not-affected
trusty
dne
Common Weakness Enumeration
References
https://security.gentoo.org/glsa/201805-10
https://sourceforge.net/p/zsh/code/ci/110b13e1090bc31ac1352b28adc2d02b6d25a102
https://usn.ubuntu.com/3593-1/
https://security.gentoo.org/glsa/201805-10
https://sourceforge.net/p/zsh/code/ci/110b13e1090bc31ac1352b28adc2d02b6d25a102
https://usn.ubuntu.com/3593-1/