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avformat/ftp: Fix Out-of-Bounds Access and Information Leak in ftp.c:393

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit a142ffdcae)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Wenxiang Qian 2019-02-13 08:47:20 +01:00 • committed by Michael Niedermayer
parent f84464c6de
commit dacc00a2e3
1 changed files with 1 additions and 1 deletions
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2
libavformat/ftp.c
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@ -386,7 +386,7 @@ static int ftp_file_size(FTPContext *s)
static const int size_codes[] = {213, 0};
snprintf(command, sizeof(command), "SIZE %s\r\n", s->path);
if (ftp_send_command(s, command, size_codes, &res) == 213 && res) {
if (ftp_send_command(s, command, size_codes, &res) == 213 && res && strlen(res) > 4) {
s->filesize = strtoll(&res[4], NULL, 10);
} else {
s->filesize = -1;