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| author | David Crosby <dave@dafyddcrosby.com> | 2015-09-06 01:53:18 +0000 |
|---|---|---|
| committer | Tatsuya Kinoshita <tats@debian.org> | 2015-09-06 12:17:36 +0000 |
| commit | aaa4ef6a72821aea697b0d18c911c352240bedd9 (patch) | |
| tree | 51be93e7b9bfefafd5986c052e1f114e15dcd136 /file.c | |
| parent | Fix stack overflow found by @kcwu (diff) | |
| download | w3m-aaa4ef6a72821aea697b0d18c911c352240bedd9.tar.gz w3m-aaa4ef6a72821aea697b0d18c911c352240bedd9.zip | |
Mitigate issue #16 found by @kcwu
Diffstat (limited to 'file.c')
| -rw-r--r-- | file.c | 20 |
1 files changed, 11 insertions, 9 deletions
@@ -26,6 +26,8 @@ #define min(a,b) ((a) > (b) ? (b) : (a)) #endif /* not min */ +#define MAX_INPUT_SIZE 80 // TODO - max should be screen line length + static int frame_source = 0; static char *guess_filename(char *file); @@ -3562,7 +3564,7 @@ process_anchor(struct parsed_tag *tag, char *tagbuf) Str process_input(struct parsed_tag *tag) { - int i, w, v, x, y, z, iw, ih; + int i = 20, v, x, y, z, iw, ih, size = 20; char *q, *p, *r, *p2, *s; Str tmp = NULL; char *qq = ""; @@ -3581,9 +3583,9 @@ process_input(struct parsed_tag *tag) parsedtag_get_value(tag, ATTR_VALUE, &q); r = ""; parsedtag_get_value(tag, ATTR_NAME, &r); - w = 20; - parsedtag_get_value(tag, ATTR_SIZE, &w); - i = 20; + parsedtag_get_value(tag, ATTR_SIZE, &size); + if (size > MAX_INPUT_SIZE) + size = MAX_INPUT_SIZE; parsedtag_get_value(tag, ATTR_MAXLENGTH, &i); p2 = NULL; parsedtag_get_value(tag, ATTR_ALT, &p2); @@ -3639,7 +3641,7 @@ process_input(struct parsed_tag *tag) } Strcat(tmp, Sprintf("<input_alt hseq=\"%d\" fid=\"%d\" type=%s " "name=\"%s\" width=%d maxlength=%d value=\"%s\"", - cur_hseq++, cur_form_id, p, html_quote(r), w, i, qq)); + cur_hseq++, cur_form_id, p, html_quote(r), size, i, qq)); if (x) Strcat_charp(tmp, " checked"); if (y) @@ -3684,18 +3686,18 @@ process_input(struct parsed_tag *tag) case FORM_INPUT_PASSWORD: i = 0; if (q) { - for (; i < qlen && i < w; i++) + for (; i < qlen && i < size; i++) Strcat_char(tmp, '*'); } - for (; i < w; i++) + for (; i < size; i++) Strcat_char(tmp, ' '); break; case FORM_INPUT_TEXT: case FORM_INPUT_FILE: if (q) - Strcat(tmp, textfieldrep(Strnew_charp(q), w)); + Strcat(tmp, textfieldrep(Strnew_charp(q), size)); else { - for (i = 0; i < w; i++) + for (i = 0; i < size; i++) Strcat_char(tmp, ' '); } break; |