Patch libtiff for CVE-2025-8851

Author: azurelinux-security

SPECS/libtiff/CVE-2025-8851.patch

@@ -0,0 +1,70 @@
+From 8f5b805d55a2b08898342b04db90653964b6177e Mon Sep 17 00:00:00 2001
+From: Lee Howard <[email protected]>
+Date: Sun, 11 Aug 2024 16:01:07 +0000
+Subject: [PATCH] Attempt to address tiffcrop Coverity scan issues 1605444,
+ 1605445, and 1605449.
+
+Signed-off-by: Azure Linux Security Servicing Account <[email protected]>
+Upstream Patch Reference: https://gitlab.com/libtiff/libtiff/-/commit/8a7a48d7a645992ca83062b3a1873c951661e2b3.patch:
+---
+ archive/tools/tiffcrop.c | 17 ++++++++++++-----
+ 1 file changed, 12 insertions(+), 5 deletions(-)
+
+diff --git a/archive/tools/tiffcrop.c b/archive/tools/tiffcrop.c
+index d3365de..93f0779 100644
+--- a/archive/tools/tiffcrop.c
++++ b/archive/tools/tiffcrop.c
+@@ -5573,7 +5573,14 @@ static int readSeparateStripsIntoBuffer(TIFF *in, uint8_t *obuf,
+             buff = srcbuffs[s];
+             strip = (s * strips_per_sample) + j;
+             bytes_read = TIFFReadEncodedStrip(in, strip, buff, stripsize);
+-            rows_this_strip = (uint32_t)(bytes_read / src_rowsize);
++            if (bytes_read < 0)
++            {
++                rows_this_strip = 0;
++            }
++            else
++            {
++                rows_this_strip = (uint32_t)(bytes_read / src_rowsize);
++            }
+             if (bytes_read < 0 && !ignore)
+             {
+                 TIFFError(TIFFFileName(in),
+@@ -6002,7 +6009,7 @@ static int computeInputPixelOffsets(struct crop_mask *crop,
+             rmargin = _TIFFClampDoubleToUInt32(crop->margins[3] * scale * xres);
+         }
+ 
+-        if ((lmargin + rmargin) > image->width)
++        if (lmargin == 0xFFFFFFFFU || rmargin == 0xFFFFFFFFU || (lmargin + rmargin) > image->width)
+         {
+             TIFFError("computeInputPixelOffsets",
+                       "Combined left and right margins exceed image width");
+@@ -6010,7 +6017,7 @@ static int computeInputPixelOffsets(struct crop_mask *crop,
+             rmargin = (uint32_t)0;
+             return (-1);
+         }
+-        if ((tmargin + bmargin) > image->length)
++        if (tmargin == 0xFFFFFFFFU || bmargin == 0xFFFFFFFFU || (tmargin + bmargin) > image->length)
+         {
+             TIFFError("computeInputPixelOffsets",
+                       "Combined top and bottom margins exceed image length");
+@@ -6592,14 +6599,14 @@ static int computeOutputPixelOffsets(struct crop_mask *crop,
+                                                ((image->bps + 7) / 8));
+         }
+ 
+-        if ((hmargin * 2.0) > (pwidth * page->hres))
++        if (hmargin == 0xFFFFFFFFU || (hmargin * 2.0) > (pwidth * page->hres))
+         {
+             TIFFError("computeOutputPixelOffsets",
+                       "Combined left and right margins exceed page width");
+             hmargin = (uint32_t)0;
+             return (-1);
+         }
+-        if ((vmargin * 2.0) > (plength * page->vres))
++        if (vmargin == 0xFFFFFFFFU || (vmargin * 2.0) > (plength * page->vres))
+         {
+             TIFFError("computeOutputPixelOffsets",
+                       "Combined top and bottom margins exceed page length");
+-- 
+2.45.4
+

SPECS/libtiff/libtiff.spec

@@ -1,7 +1,7 @@
 Summary:        TIFF libraries and associated utilities.
 Name:           libtiff
 Version:        4.6.0
-Release:        7%{?dist}
+Release:        8%{?dist}
 License:        libtiff
 Vendor:         Microsoft Corporation
 Distribution:   Azure Linux
@@ -16,6 +16,7 @@ Patch4:         CVE-2023-6228.patch
 Patch5:         CVE-2025-8534.patch
 Patch6:         CVE-2025-8177.patch
 Patch7:         CVE-2025-8176.patch
+Patch8:         CVE-2025-8851.patch
 
 BuildRequires:  autoconf
 BuildRequires:  automake
@@ -72,6 +73,9 @@ make %{?_smp_mflags} -k check
 %exclude %{_docdir}/tiff-%{version}/LICENSE.md
 
 %changelog
+* Thu Aug 14 2025 Azure Linux Security Servicing Account <[email protected]> - 4.6.0-8
+- Patch for CVE-2025-8851
+
 * Tue Aug 05 2025 Azure Linux Security Servicing Account <[email protected]> - 4.6.0-7
 - Patch for CVE-2025-8534, CVE-2025-8177, CVE-2025-8176