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diff --git a/Mailman/CSRFcheck.py b/Mailman/CSRFcheck.py
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index 24e3e11..81998cf 100644
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--- a/Mailman/CSRFcheck.py
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+++ b/Mailman/CSRFcheck.py
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@@ -55,7 +55,7 @@ def csrf_token(mlist, contexts, user=None):
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token = binascii.hexlify(marshal.dumps((issued, keymac)))
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return token
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-def csrf_check(mlist, token, options_user=None):
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+def csrf_check(mlist, token, cgi_user=None):
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""" check token by mailman cookie validation algorithm """
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try:
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issued, keymac = marshal.loads(binascii.unhexlify(token))
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@@ -67,12 +67,25 @@ def csrf_check(mlist, token, options_user=None):
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key, user = key.split('+', 1)
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else:
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user = None
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+ # Don't allow unprivileged tokens for admin or admindb.
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+ if cgi_user == 'admin':
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+ if key not in ('admin', 'site'):
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+ syslog('mischief',
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+ 'admin form submitted with CSRF token issued for %s.',
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+ key + '+' + user if user else key)
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+ return False
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+ elif cgi_user == 'admindb':
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+ if key not in ('moderator', 'admin', 'site'):
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+ syslog('mischief',
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+ 'admindb form submitted with CSRF token issued for %s.',
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+ key + '+' + user if user else key)
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+ return False
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if user:
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# This is for CVE-2021-42097. The token is a user token because
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# of the fix for CVE-2021-42096 but it must match the user for
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# whom the options page is requested.
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raw_user = UnobscureEmail(urllib.unquote(user))
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- if options_user and options_user != raw_user:
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+ if cgi_user and cgi_user != raw_user:
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syslog('mischief',
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'Form for user %s submitted with CSRF token '
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'issued for %s.',
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diff --git a/Mailman/Cgi/admin.py b/Mailman/Cgi/admin.py
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index d2577b5..7c600df 100644
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--- a/Mailman/Cgi/admin.py
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+++ b/Mailman/Cgi/admin.py
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@@ -107,7 +107,8 @@ def main():
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'legend']
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params = cgidata.keys()
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if set(params) - set(safe_params):
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- csrf_checked = csrf_check(mlist, cgidata.getfirst('csrf_token'))
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+ csrf_checked = csrf_check(mlist, cgidata.getfirst('csrf_token'),
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+ 'admin')
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else:
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csrf_checked = True
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# if password is present, void cookie to force password authentication.
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diff --git a/Mailman/Cgi/admindb.py b/Mailman/Cgi/admindb.py
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index 58bb357..c152501 100644
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--- a/Mailman/Cgi/admindb.py
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+++ b/Mailman/Cgi/admindb.py
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@@ -144,7 +144,8 @@ def main():
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safe_params = ['adminpw', 'admlogin', 'msgid', 'sender', 'details']
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params = cgidata.keys()
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if set(params) - set(safe_params):
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- csrf_checked = csrf_check(mlist, cgidata.getfirst('csrf_token'))
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+ csrf_checked = csrf_check(mlist, cgidata.getfirst('csrf_token'),
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+ 'admindb')
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else:
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csrf_checked = True
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# if password is present, void cookie to force password authentication.
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diff --git a/Mailman/Cgi/edithtml.py b/Mailman/Cgi/edithtml.py
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index 1dd9e87..170e811 100644
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--- a/Mailman/Cgi/edithtml.py
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+++ b/Mailman/Cgi/edithtml.py
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@@ -111,7 +111,8 @@ def main():
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safe_params = ['VARHELP', 'adminpw', 'admlogin']
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params = cgidata.keys()
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if set(params) - set(safe_params):
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- csrf_checked = csrf_check(mlist, cgidata.getfirst('csrf_token'))
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+ csrf_checked = csrf_check(mlist, cgidata.getfirst('csrf_token'),
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+ 'admin')
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else:
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csrf_checked = True
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# if password is present, void cookie to force password authentication.
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