diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | generic/tkImgGIF.c | 8 | ||||
| -rw-r--r-- | tests/imgPhoto.test | 31 |
3 files changed, 42 insertions, 2 deletions
@@ -1,3 +1,8 @@ +2008-02-01 Reinhard Max <max@suse.de> + + * generic/tkImgGIF.c: Fixed a buffer overflow (CVE-2006-4484). + * tests/imgPhoto.test: Added a test for the above. + 2007-12-31 Don Porter <dgp@users.sourceforge.net> *** 8.4.17 TAGGED FOR RELEASE *** diff --git a/generic/tkImgGIF.c b/generic/tkImgGIF.c index c8588bc..b095414 100644 --- a/generic/tkImgGIF.c +++ b/generic/tkImgGIF.c @@ -29,7 +29,7 @@ * | provided "as is" without express or implied warranty. | * +-------------------------------------------------------------------+ * - * RCS: @(#) $Id: tkImgGIF.c,v 1.24.2.5 2007/09/11 18:01:45 rmax Exp $ + * RCS: @(#) $Id: tkImgGIF.c,v 1.24.2.6 2008/02/01 16:59:58 rmax Exp $ */ /* @@ -826,6 +826,12 @@ ReadImage(interp, imagePtr, chan, len, rows, cmap, Tcl_PosixError(interp), (char *) NULL); return TCL_ERROR; } + + if (initialCodeSize > MAX_LWZ_BITS) { + Tcl_SetResult(interp, "malformed image", TCL_STATIC); + return TCL_ERROR; + } + if (transparent != -1) { cmap[transparent][CM_RED] = 0; cmap[transparent][CM_GREEN] = 0; diff --git a/tests/imgPhoto.test b/tests/imgPhoto.test index 4118f74..244f0bb 100644 --- a/tests/imgPhoto.test +++ b/tests/imgPhoto.test @@ -9,7 +9,7 @@ # # Author: Paul Mackerras (paulus@cs.anu.edu.au) # -# RCS: @(#) $Id: imgPhoto.test,v 1.15.2.5 2007/09/11 18:01:46 rmax Exp $ +# RCS: @(#) $Id: imgPhoto.test,v 1.15.2.6 2008/02/01 16:59:58 rmax Exp $ package require tcltest 2.1 namespace import -force tcltest::configure @@ -681,6 +681,35 @@ test imgPhoto-14.3 {GIF -index interleaving and small frames} -setup { image delete $i } +test imgPhoto-14.4 {GIF buffer overflow} -setup { + set i [image create photo] +} -body { + # This crashes Tk up to 8.4.17 and 8.5.0 + $i configure -data { + R0lGODlhCgAKAPcAAAAAAIAAAACAAICAAAAAgIAAgACAgICAgMDAwP8AAAD/ + AP//AAAA//8A/wD//////wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA + AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA + AAAAMwAAZgAAmQAAzAAA/wAzAAAzMwAzZgAzmQAzzAAz/wBmAABmMwBmZgBm + mQBmzABm/wCZAACZMwCZZgCZmQCZzACZ/wDMAADMMwDMZgDMmQDMzADM/wD/ + AAD/MwD/ZgD/mQD/zAD//zMAADMAMzMAZjMAmTMAzDMA/zMzADMzMzMzZjMz + mTMzzDMz/zNmADNmMzNmZjNmmTNmzDNm/zOZADOZMzOZZjOZmTOZzDOZ/zPM + ADPMMzPMZjPMmTPMzDPM/zP/ADP/MzP/ZjP/mTP/zDP//2YAAGYAM2YAZmYA + mWYAzGYA/2YzAGYzM2YzZmYzmWYzzGYz/2ZmAGZmM2ZmZmZmmWZmzGZm/2aZ + AGaZM2aZZmaZmWaZzGaZ/2bMAGbMM2bMZmbMmWbMzGbM/2b/AGb/M2b/Zmb/ + mWb/zGb//5kAAJkAM5kAZpkAmZkAzJkA/5kzAJkzM5kzZpkzmZkzzJkz/5lm + AJlmM5lmZplmmZlmzJlm/5mZAJmZM5mZZpmZmZmZzJmZ/5nMAJnMM5nMZpnM + mZnMzJnM/5n/AJn/M5n/Zpn/mZn/zJn//8wAAMwAM8wAZswAmcwAzMwA/8wz + AMwzM8wzZswzmcwzzMwz/8xmAMxmM8xmZsxmmcxmzMxm/8yZAMyZM8yZZsyZ + mcyZzMyZ/8zMAMzMM8zMZszMmczMzMzM/8z/AMz/M8z/Zsz/mcz/zMz///8A + AP8AM/8AZv8Amf8AzP8A//8zAP8zM/8zZv8zmf8zzP8z//9mAP9mM/9mZv9m + mf9mzP9m//+ZAP+ZM/+ZZv+Zmf+ZzP+Z///MAP/MM//MZv/Mmf/MzP/M//// + AP//M///Zv//mf//zP///yH5BAEAABAALAAAAAAKAAoAABUSAAD/HEiwoMGD + CBMqXMiwYcKAADs= + } +} -cleanup { + image delete $i +} -returnCodes error -result {malformed image} + test imgPhoto-15.1 {photo images can fail to allocate memory gracefully} \ {nonPortable} { # This is not portable to very large machines with more around |