| Buffer overflow in the readextension function in gif2tiff.c |
| allows remote attackers to cause a denial of service via a crafted GIF file. |
| |
| External References: |
| https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-3186 |
| https://bugzilla.redhat.com/show_bug.cgi?id=1319503 |
| |
| CVE: CVE-2016-3186 |
| Upstream-Status: Backport (RedHat) |
| https://bugzilla.redhat.com/attachment.cgi?id=1144235&action=diff |
| |
| Signed-off-by: Yi Zhao <yi.zhao@windirver.com> |
| |
| --- tiff-4.0.6/tools/gif2tiff.c 2016-04-06 15:43:01.586048341 +0200 |
| +++ tiff-4.0.6/tools/gif2tiff.c 2016-04-06 15:48:05.523207710 +0200 |
| @@ -349,7 +349,7 @@ |
| int status = 1; |
| |
| (void) getc(infile); |
| - while ((count = getc(infile)) && count <= 255) |
| + while ((count = getc(infile)) && count >= 0 && count <= 255) |
| if (fread(buf, 1, count, infile) != (size_t) count) { |
| fprintf(stderr, "short read from file %s (%s)\n", |
| filename, strerror(errno)); |