virtualenv: Bash activator leaves the --prompt value unescaped in PS1 when promptvars is off, so prompt expansion later executes it (regression in 21.14.9)

[ Description ]Official description

virtualenv is a tool for creating isolated virtual python environments. From 21.14.9 until 21.14.13, the bash bin/activate script can copy an attacker-controlled --prompt value into PS1 without escaping dollar signs or backticks when both promptvars and POSIX mode are disabled during activation. Re-enabling promptvars, running set -o posix, or starting an interactive child bash that inherits the exported PS1 can then expand command substitution in the stored VIRTUAL_ENV_PROMPT value and execute commands as the user who activates the environment. This issue is fixed in version 21.14.13.

[ Fixes ]Fixes and patches

• virtualenv 21.14.13Fixed version · GitHub Advisories · pip package virtualenv: upgrade to 21.14.13 or later (affected >= 21.14.9, < 21.14.13)

[ Packages ]Affected open-source packages

• virtualenv pipAffected >= 21.14.9, < 21.14.13 · fixed in 21.14.13 · GHSA-cx6f-vjhg-g3cc

[ References ]References

• github.com/pypa/virtualenv/commit/3598e201f6f044e389136b2347a8a919ac03c5f4
• github.com/pypa/virtualenv/pull/3466
• github.com/pypa/virtualenv/releases/tag/21.14.13
• github.com/pypa/virtualenv/security/advisories/GHSA-cx6f-vjhg-g3cc