[New-bugs-announce] [issue30730] Injecting environment variable in subprocess on Windows

[Serhiy Storchaka]

New submission from Serhiy Storchaka:

It is possible to inject an environment variable in subprocess on Windows if a user data is passed to a subprocess via environment variable.

Provided PR fixes this vulnerability. It also adds other checks for invalid environment (variable names containing '=') and command arguments (containing '\0').

This was a part of issue13617, but extracted to a separate issue due to increased severity.

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components: Extension Modules
messages: 296618
nosy: paul.moore, serhiy.storchaka, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
stage: patch review
status: open
title: Injecting environment variable in subprocess on Windows
type: security
versions: Python 2.7, Python 3.5, Python 3.6, Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30730>
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