CVE-2021-45444

published 2022-02-14

CVE-2021-45444: In zsh before 5.8.1, an attacker can achieve code execution if they control a command output inside the prompt, as demonstrated by a %F argument. This occurs…

Priority P3 42 high 7.8 CVSS 3.1

AV L AC L PR N UI R S U C H I H A H

In zsh before 5.8.1, an attacker can achieve code execution if they control a command output inside the prompt, as demonstrated by a %F argument. This occurs because of recursive PROMPT_SUBST expansion.

Affected

23 ranges

Vendor	Product	Version range	Fixed in
apple	mac_os_x	—	—
apple	mac_os_x	>= 10.15 < 10.15.7	10.15.7
apple	macos	>= 11.0 < 11.6.6	11.6.6
apple	macos	>= 12.0.0 < 12.4	12.4
apple	macos_big_sur	—	—
apple	macos_monterey	—	—
apple	security_update_2022-004_catalina	—	—
debian	debian_linux	—	—
debian	debian_linux	—	—
debian	debian_linux	—	—
debian	zsh	< zsh 5.8.1-1 (bookworm)	zsh 5.8.1-1 (bookworm)
fedoraproject	fedora	—	—
fedoraproject	fedora	—	—
msrc	cbl2_zsh_5.9-1_on_cbl_mariner_2.0	—	—
msrc	cm1_zsh_5.8.1-1_on_cbl_mariner_1.0	—	—
zsh	zsh	< 5.8.1	5.8.1
zsh	zsh	>= 0 < 5.8-6+deb11u1	5.8-6+deb11u1
zsh	zsh	>= 0 < 5.8.1-1	5.8.1-1
zsh	zsh	>= 0 < 5.8.1-1	5.8.1-1
zsh	zsh	>= 0 < 5.8.1-1	5.8.1-1
zsh	zsh	>= 0 < 5.4.2-3ubuntu3.2	5.4.2-3ubuntu3.2
zsh	zsh	>= 0 < 5.8-3ubuntu1.1	5.8-3ubuntu1.1
zsh	zsh	>= 0 < 5.1.1-1ubuntu2.3+esm1	5.1.1-1ubuntu2.3+esm1

CVSS provenance

nvd v3.1 7.8 HIGH CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd v2.0 5.1 MEDIUM AV:N/AC:H/Au:N/C:P/I:P/A:P

osv 7.8 HIGH

vendor_debian 7.8 HIGH

vendor_msrc 7.8 HIGH

vendor_redhat 7.8 HIGH

vendor_ubuntu 7.8 HIGH

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CWE-77