99df5e7b57
Currently, there is no limit to incoming line length, so an evil client could cause a memory exhaustion DoS by issuing very long lines. This patch fixes the bug by limiting the size of the lines. To do that, we replace the textproto.Conn with a pair of buffered reader and writer, which simplify the code and allow for better and cleaner control. Thanks to Max Mazurov (fox.cpp@disroot.org) for finding and reporting this issue.
6 lines
1.0 KiB
Plaintext
6 lines
1.0 KiB
Plaintext
c tcp_connect localhost:1025
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c <~ 220
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c -> HELO aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1aaaaaaaaa1
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c <~ 554
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