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| author | Leonardo Arena <rnalrd@alpinelinux.org> | 2016-07-04 14:35:08 +0000 |
|---|---|---|
| committer | Leonardo Arena <rnalrd@alpinelinux.org> | 2016-07-04 14:36:07 +0000 |
| commit | 7f2845dc97725af0dc4230433d9cb42a76c552db (patch) | |
| tree | 6f3ae5c43b4765def2a8df9720fff412408ccf4b /main/tiff/CVE-2015-8784.patch | |
| parent | 1d23785857140fd8affd228a88587c19baec6dd6 (diff) | |
| download | aports-7f2845dc97725af0dc4230433d9cb42a76c552db.tar.bz2 aports-7f2845dc97725af0dc4230433d9cb42a76c552db.tar.xz | |
main/tiff: security fixes. Fixes #5823
Diffstat (limited to 'main/tiff/CVE-2015-8784.patch')
| -rw-r--r-- | main/tiff/CVE-2015-8784.patch | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/main/tiff/CVE-2015-8784.patch b/main/tiff/CVE-2015-8784.patch new file mode 100644 index 0000000000..75504e1240 --- /dev/null +++ b/main/tiff/CVE-2015-8784.patch @@ -0,0 +1,66 @@ +From b18012dae552f85dcc5c57d3bf4e997a15b1cc1c Mon Sep 17 00:00:00 2001 +From: erouault <erouault> +Date: Sun, 27 Dec 2015 16:55:20 +0000 +Subject: [PATCH] * libtiff/tif_next.c: fix potential out-of-bound write in + NeXTDecode() triggered by http://lcamtuf.coredump.cx/afl/vulns/libtiff5.tif + (bugzilla #2508) + +--- + ChangeLog | 6 ++++++ + libtiff/tif_next.c | 10 ++++++++-- + 2 files changed, 14 insertions(+), 2 deletions(-) + +diff --git a/ChangeLog b/ChangeLog +index b8aa23c..04926a3 100644 +--- a/ChangeLog ++++ b/ChangeLog +@@ -1,5 +1,11 @@ + 2015-12-27 Even Rouault <even.rouault at spatialys.com> + ++ * libtiff/tif_next.c: fix potential out-of-bound write in NeXTDecode() ++ triggered by http://lcamtuf.coredump.cx/afl/vulns/libtiff5.tif ++ (bugzilla #2508) ++ ++2015-12-27 Even Rouault <even.rouault at spatialys.com> ++ + * libtiff/tif_luv.c: fix potential out-of-bound writes in decode + functions in non debug builds by replacing assert()s by regular if + checks (bugzilla #2522). +diff --git a/libtiff/tif_next.c b/libtiff/tif_next.c +index dd669cc..0a5b635 100644 +--- a/libtiff/tif_next.c ++++ b/libtiff/tif_next.c +@@ -37,7 +37,7 @@ + case 0: op[0] = (unsigned char) ((v) << 6); break; \ + case 1: op[0] |= (v) << 4; break; \ + case 2: op[0] |= (v) << 2; break; \ +- case 3: *op++ |= (v); break; \ ++ case 3: *op++ |= (v); op_offset++; break; \ + } \ + } + +@@ -106,6 +106,7 @@ NeXTDecode(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) + uint32 imagewidth = tif->tif_dir.td_imagewidth; + if( isTiled(tif) ) + imagewidth = tif->tif_dir.td_tilewidth; ++ tmsize_t op_offset = 0; + + /* + * The scanline is composed of a sequence of constant +@@ -122,10 +123,15 @@ NeXTDecode(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) + * bounds, potentially resulting in a security + * issue. + */ +- while (n-- > 0 && npixels < imagewidth) ++ while (n-- > 0 && npixels < imagewidth && op_offset < scanline) + SETPIXEL(op, grey); + if (npixels >= imagewidth) + break; ++ if (op_offset >= scanline ) { ++ TIFFErrorExt(tif->tif_clientdata, module, "Invalid data for scanline %ld", ++ (long) tif->tif_row); ++ return (0); ++ } + if (cc == 0) + goto bad; + n = *bp++, cc--; |