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| author | Daniel Stenberg <daniel@haxx.se> | 2018-06-13 12:24:40 +0200 |
|---|---|---|
| committer | Daniel Stenberg <daniel@haxx.se> | 2018-07-09 08:15:48 +0200 |
| commit | ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628 (patch) | |
| tree | 2c1aeab789324e085d673ae3211cabad90ee01c6 | |
| parent | 0b4ccc97f26316476d4c2abbd429952bf61b6375 (diff) | |
| download | curl-ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628.tar.gz | |
smtp: use the upload buffer size for scratch buffer malloc
... not the read buffer size, as that can be set smaller and thus cause
a buffer overflow! CVE-2018-0500
Reported-by: Peter Wu
Bug: https://curl.haxx.se/docs/adv_2018-70a2.html
| -rw-r--r-- | lib/smtp.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/smtp.c b/lib/smtp.c index e6872badb..ecf10a41a 100644 --- a/lib/smtp.c +++ b/lib/smtp.c @@ -1563,13 +1563,14 @@ CURLcode Curl_smtp_escape_eob(struct connectdata *conn, const ssize_t nread) if(!scratch || data->set.crlf) { oldscratch = scratch; - scratch = newscratch = malloc(2 * data->set.buffer_size); + scratch = newscratch = malloc(2 * UPLOAD_BUFSIZE); if(!newscratch) { failf(data, "Failed to alloc scratch buffer!"); return CURLE_OUT_OF_MEMORY; } } + DEBUGASSERT(UPLOAD_BUFSIZE >= nread); /* Have we already sent part of the EOB? */ eob_sent = smtp->eob; |