Package: tk8.3
Version: 8.3.5-4
Severity: grave
Tags: security patch

Hi,
the following CVE (Common Vulnerabilities & Exposures) id was
published for tk8.3.

CVE-2007-5137[0]:
| Buffer overflow in the ReadImage function in generic/tkImgGIF.c in Tcl
| (Tcl/Tk) before 8.4.16 allows remote attackers to execute arbitrary
| code via multi-frame interlaced GIF files in which later frames are
| smaller than the first.

If you fix this vulnerability please also include the CVE id
in your changelog entry.

Attached is a patch to fix this vulnerability.

For further information:
[0] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5137

Kind regards
Nico

-- 
Nico Golde - http://ngolde.de - [EMAIL PROTECTED] - GPG: 0x73647CFF
For security reasons, all text in this mail is double-rot13 encrypted.
--- tkImgGIF.c	2002-03-26 03:29:01.000000000 +0100
+++ tkImgGIF.new.c	2007-10-04 20:40:09.000000000 +0200
@@ -960,7 +960,7 @@
 	/* If interlacing, the next ypos is not just +1 */
 	if (interlace) {
 	    ypos += interlaceStep[pass];
-	    while (ypos >= height) {
+	    while (ypos >= rows) {
 		pass++;
 		if (pass > 3) {
 		    return TCL_OK;

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