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44 lines
1.2 KiB
44 lines
1.2 KiB
--- a/src/reqs.c
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+++ b/src/reqs.c
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@@ -610,6 +610,11 @@ add_header_to_connection (hashmap_t hash
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return hashmap_insert (hashofheaders, header, sep, len);
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}
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+/* define max number of headers. big enough to handle legitimate cases,
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+ * but limited to avoid DoS
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+ */
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+#define MAX_HEADERS 10000
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+
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/*
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* Read all the headers from the stream
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*/
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@@ -617,6 +622,7 @@ static int get_all_headers (int fd, hash
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{
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char *line = NULL;
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char *header = NULL;
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+ int count;
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char *tmp;
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ssize_t linelen;
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ssize_t len = 0;
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@@ -625,7 +631,7 @@ static int get_all_headers (int fd, hash
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assert (fd >= 0);
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assert (hashofheaders != NULL);
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- for (;;) {
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+ for (count = 0; count < MAX_HEADERS; count++) {
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if ((linelen = readline (fd, &line)) <= 0) {
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safefree (header);
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safefree (line);
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@@ -691,6 +697,12 @@ static int get_all_headers (int fd, hash
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safefree (line);
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}
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+
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+ /* if we get there, this is we reached MAX_HEADERS count.
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+ bail out with error */
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+ safefree (header);
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+ safefree (line);
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+ return -1;
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}
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/*
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