Improper Neutralization of Special Elements in Output Used by a Downstream Component in fish-shell - CVE-2022-20001

Vulnerability identifier: #VU61467

CSH Severity: High

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2022-20001

CWE-ID: CWE-74

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a flaw in the "fish_git_prompt" function. A remote attacker can trick a victim to navigate a specially crafted GIT repository and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

fish-shell
Gentoo Linux
Debian Linux
openEuler
Ubuntu
Fedora
fish (Ubuntu package)
fish-common (Ubuntu package)
fish
fish-debugsource
fish-debuginfo
app-shells/fish
fish (Debian package)

Install updates from vendor's website.

fish-shell - update to 3.4.0
fish (Ubuntu package) - addressed in versions 3.1.0-1.2ubuntu0.1~esm1, 3.3.1+ds-3ubuntu0.1~esm1
fish-common (Ubuntu package) - addressed in versions 3.1.0-1.2ubuntu0.1~esm1, 3.3.1+ds-3ubuntu0.1~esm1
fish - update to 3.3.1-2
fish-debugsource - update to 3.3.1-2
fish-debuginfo - update to 3.3.1-2
fish - addressed in versions 3.4.1-1.fc35, 3.4.1-1.fc36
app-shells/fish - update to 3.4.0
fish (Debian package) - update to 3.1.2-3+deb11u1

• https://github.com/fish-shell/fish-shell/pull/8589
• https://github.com/fish-shell/fish-shell/security/advisories/GHSA-pj5f-6vxj-f5mq
• https://github.com/fish-shell/fish-shell/releases/tag/3.4.0

• Remote code execution in fish-shell
• Debian update for fish
• Gentoo update for Fish
• openEuler update for fish
• Fedora 35 update for fish
• Fedora 36 update for fish
• Ubuntu update for fish