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gh-68966: fix CVE-2015-20107 #93014

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gh-68966: fix CVE-2015-20107 #93014

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6 changes: 4 additions & 2 deletions Lib/mailcap.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@

import os
import warnings
from shlex import quote

__all__ = ["getcaps","findmatch"]

Expand Down Expand Up @@ -203,8 +204,6 @@ def subst(field, MIMEtype, filename, plist=[]):
c = field[i]; i = i+1
if c == '%':
res = res + c
elif c == 's':
res = res + filename
elif c == 't':
res = res + MIMEtype
elif c == '{':
Expand All @@ -219,6 +218,9 @@ def subst(field, MIMEtype, filename, plist=[]):
# %F == list of alternating type and filename for parts
else:
res = res + '%' + c
res = res.replace("'%s'" , quote(filename))
res = res.replace('"%s"' , quote(filename))
res = res.replace('%s' , quote(filename))
return res

def findparam(name, plist):
Expand Down