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Use PerlLIO_dup_cloexec in Perl_dirp_dup to set O_CLOEXEC - #23361
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dup doesn't mark the new descriptor as close-on-exec, which can lead to a descriptor leaking to the new process.
khwilliamson
approved these changes
Jun 9, 2025
ilmari
approved these changes
Jun 9, 2025
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@steve-m-hay This should be applied to maint-5.38 and maint-5.40 before the security release. (Aside from this we also need a perldelta entry before they can ship.) |
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Cherry-picked as required. |
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dupdoesn't mark the new descriptor as close-on-exec, which can lead to a descriptor leaking to the new process.