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| author | Stanislav Malyshev <stas@php.net> | 2018-02-20 15:34:43 -0800 |
|---|---|---|
| committer | Stanislav Malyshev <stas@php.net> | 2018-02-20 15:44:00 -0800 |
| commit | 36239fee3638a8f4cfe3ca3aba597cb1699abd90 (patch) | |
| tree | 7c596bffeca8d0f77b1e1d00bf45fd88e3763a64 | |
| parent | 67ec3ce1ec58e068378f10e2c6596c71d288fc48 (diff) | |
| download | php-git-36239fee3638a8f4cfe3ca3aba597cb1699abd90.tar.gz | |
Fix bug #75981: prevent reading beyond buffer start
| -rw-r--r-- | ext/standard/http_fopen_wrapper.c | 4 | ||||
| -rw-r--r-- | ext/standard/tests/http/bug75981.phpt | 32 |
2 files changed, 34 insertions, 2 deletions
diff --git a/ext/standard/http_fopen_wrapper.c b/ext/standard/http_fopen_wrapper.c index ed6adc0039..78bd935a0e 100644 --- a/ext/standard/http_fopen_wrapper.c +++ b/ext/standard/http_fopen_wrapper.c @@ -737,9 +737,9 @@ finish: tmp_line, response_code); } } - if (tmp_line[tmp_line_len - 1] == '\n') { + if (tmp_line_len >= 1 && tmp_line[tmp_line_len - 1] == '\n') { --tmp_line_len; - if (tmp_line[tmp_line_len - 1] == '\r') { + if (tmp_line_len >= 1 &&tmp_line[tmp_line_len - 1] == '\r') { --tmp_line_len; } } diff --git a/ext/standard/tests/http/bug75981.phpt b/ext/standard/tests/http/bug75981.phpt new file mode 100644 index 0000000000..d415de66b9 --- /dev/null +++ b/ext/standard/tests/http/bug75981.phpt @@ -0,0 +1,32 @@ +--TEST-- +Bug #75981 (stack-buffer-overflow while parsing HTTP response) +--INI-- +allow_url_fopen=1 +--SKIPIF-- +<?php require 'server.inc'; http_server_skipif('tcp://127.0.0.1:12342'); ?> +--FILE-- +<?php +require 'server.inc'; + +$options = [ + 'http' => [ + 'protocol_version' => '1.1', + 'header' => 'Connection: Close' + ], +]; + +$ctx = stream_context_create($options); + +$responses = [ + "data://text/plain,000000000100\xA\xA" +]; +$pid = http_server('tcp://127.0.0.1:12342', $responses); + +echo @file_get_contents('http://127.0.0.1:12342/', false, $ctx); + +http_server_kill($pid); + +?> +DONE +--EXPECT-- +DONE |