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Diffstat (limited to 'Lib/urllib/request.py')
| -rw-r--r-- | Lib/urllib/request.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py index 2a3d715..a8c870b 100644 --- a/Lib/urllib/request.py +++ b/Lib/urllib/request.py @@ -2596,6 +2596,11 @@ def _proxy_bypass_macosx_sysconf(host, proxy_settings): mask = 8 * (m.group(1).count('.') + 1) else: mask = int(mask[1:]) + + if mask < 0 or mask > 32: + # System libraries ignore invalid prefix lengths + continue + mask = 32 - mask if (hostIP >> mask) == (base >> mask): |