walkero
/
openjpeg
1
0
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity

Fix an out-of-bounds read in imagetopgx() 

In case this function is invoked with a short outfile, a out-of-bounds read
will occur. This is currently not possible with opj_decompress, as this case
is intercepted in `get_file_format()` in `src/bin/jp2/opj_decompress.c`,
nevertheless it is not nice and robost code.

This fixes #1069.
This commit is contained in:
Karol Babioch 2018-03-02 17:33:30 +01:00
parent 564fbfb678
commit 60305fdc4b
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/bin/jp2/convert.c
View File

@ -1372,8 +1372,10 @@ int imagetopgx(opj_image_t * image, const char *outfile)
const size_t dotpos = olen - 4;
const size_t total = dotpos + 1 + 1 + 4; /* '-' + '[1-3]' + '.pgx' */
if (outfile[dotpos] != '.') {
/* `pgx` was recognized but there is no dot at expected position */
if (olen < 5 || outfile[dotpos] != '.') {
/* `pgx` was recognized but there is no dot at expected position
or outfile is too short to contain anything meaningful other
than the file extension `.pgx` itself */
fprintf(stderr, "ERROR -> Impossible happen.");
goto fin;
}