It was discovered that zsh, a powerful shell and scripting language, did not prevent recursive prompt expansion. This would allow an attacker to execute arbitrary commands into a user's shell, for instance by tricking a vcs_info user into checking out a git branch with a specially crafted name. For the oldstable distribution (buster), this problem has been fixed in version 5.7.1-1+deb10u1. For the stable distribution (bullseye), this problem has been fixed in version 5.8-6+deb11u1. We recommend that you upgrade your zsh packages. For the detailed security status of zsh please refer to its security tracker page at: https://security-tracker.debian.org/tracker/zsh
It was discovered that zsh, a powerful shell and scripting language, did not prevent recursive prompt expansion. This would allow an attacker to execute arbitrary commands into a user's shell, for instance by tricking a vcs_info user into checking out a git branch with a specially crafted name.
For the oldstable distribution (buster), this problem has been fixed in version 5.7.1-1+deb10u1.
For the stable distribution (bullseye), this problem has been fixed in version 5.8-6+deb11u1.
We recommend that you upgrade your zsh packages.
For the detailed security status of zsh please refer to its security tracker page at: https://security-tracker.debian.org/tracker/zsh
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