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avoid using "ANSI_X3.4-1968" as preferred encoding, if missing environment variables 'LANGUAGE', 'LC_ALL', 'LC_CTYPE', and 'LANG' 

(especially critical if default value `encoding = auto` configured).

As PoC and coverage (this case fails without this "fix"):
$ env -i PATH="$PATH" bin/fail2ban-testcases --fast --no-network testAddBanInvalidEncoded
pull/1868/head
sebres 2017-08-18 13:30:50 +02:00
parent f84e58e769
commit 8e6b4346dc
1 changed files with 4 additions and 0 deletions
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4
fail2ban/helpers.py
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@ -34,6 +34,10 @@ from .server.mytime import MyTime
PREFER_ENC = locale.getpreferredencoding()
# correct prefered encoding if lang not set in environment:
if PREFER_ENC.startswith('ANSI_'): # pragma: no cover
if all((os.getenv(v) in (None, "") for v in ('LANGUAGE', 'LC_ALL', 'LC_CTYPE', 'LANG'))):
PREFER_ENC = 'UTF-8';
def formatExceptionInfo():