Patch for CVE-2020-24890.

78d323ecbe6a9752aee6e97118a76d40704d73ee.patch

@@ -0,0 +1,97 @@
+From 78d323ecbe6a9752aee6e97118a76d40704d73ee Mon Sep 17 00:00:00 2001
+From: Alex Tutubalin <lexa@lexa.ru>
+Date: Thu, 20 Aug 2020 15:24:40 +0300
+Subject: [PATCH] Additional checks in hassy model parser
+
+---
+ src/metadata/hasselblad_model.cpp | 39 ++++++++++++++++++++-----------
+ 1 file changed, 26 insertions(+), 13 deletions(-)
+
+diff --git a/src/metadata/hasselblad_model.cpp b/src/metadata/hasselblad_model.cpp
+index 979f56c6..f1cd0d6d 100644
+--- a/src/metadata/hasselblad_model.cpp
++++ b/src/metadata/hasselblad_model.cpp
+@@ -93,7 +93,7 @@ static const char *Hasselblad_SensorEnclosures[] = {
+   int norm_model_isSet = 0;
+ 
+   if (model[0] == ' ')
+-    memmove(model, model+1, strlen(model));
++    memmove(model, model+1, MIN(sizeof(model)-1,strlen(model)));
+ 
+   if (!imHassy.format) {
+     if (dng_version) {
+@@ -116,49 +116,62 @@ static const char *Hasselblad_SensorEnclosures[] = {
+     memmove(imHassy.SensorUnitConnector, imHassy.SensorUnitConnector+11, 64-11);
+ 
+   if (imHassy.format == LIBRAW_HF_AdobeDNG) { // Adobe DNG, use LocalizedCameraModel
++      imgdata.color.LocalizedCameraModel[63] = 0; // make sure 0-termination
+     if ((ps = strrchr(imgdata.color.LocalizedCameraModel, '-')))
+       c = ps-imgdata.color.LocalizedCameraModel;
+     else c = strlen(imgdata.color.LocalizedCameraModel);
+-    memcpy(tmp_model, imgdata.color.LocalizedCameraModel, c);
+-    tmp_model[c] = 0;
++    int cc = MIN(c, sizeof(tmp_model)-1);
++    memcpy(tmp_model, imgdata.color.LocalizedCameraModel,cc);
++    tmp_model[cc] = 0;
+     if (strcasestr(imgdata.color.UniqueCameraModel, "coated")) {
+-      strcpy(normalized_model, imgdata.color.UniqueCameraModel);
++      strncpy(normalized_model, imgdata.color.UniqueCameraModel,sizeof(imgdata.color.UniqueCameraModel)-1);
++      normalized_model[sizeof(imgdata.color.UniqueCameraModel) - 1] = 0;
+       norm_model_isSet = 1;
+     }
+       if (!strncmp(normalized_model, "Hasselblad ", 11))
+         memmove(normalized_model, normalized_model+11, 64-11);
+-  } else
+-    strcpy(tmp_model, imgdata.color.UniqueCameraModel);
++  }
++  else
++  {
++      strncpy(tmp_model, imgdata.color.UniqueCameraModel, sizeof(imgdata.color.UniqueCameraModel) - 1);
++      tmp_model[63] = 0;
++  }
+   if (!strncasecmp(tmp_model, "Hasselblad ", 11))
+     memmove(tmp_model, tmp_model+11, 64-11);
+ 
+ // check if model tag contains manual CaptureSequenceInitiator info:
+-  strcpy(imHassy.CaptureSequenceInitiator, model);
++  strncpy(imHassy.CaptureSequenceInitiator, model,31);
++  imHassy.CaptureSequenceInitiator[31] = 0;
+   FORC(int(sizeof Hasselblad_Ctrl / sizeof *Hasselblad_Ctrl)) {
+     if (strcasestr(model, Hasselblad_Ctrl[c])) {
+ // yes, fill 'model' with sensor unit data
+-      strcpy(model, tmp_model);
++      strncpy(model, tmp_model,63);
++      model[63] = 0;
+       break;
+     }
+   }
+ 
+   ps = strchr(model, '-');
+   if (ps) {                  // check if model contains both host body and sensor version, resolution, MS info
+-    strcpy(imHassy.SensorUnit, model);
++    strncpy(imHassy.SensorUnit, model,63);
+     memcpy(imHassy.HostBody, model, ps-model);
+     imHassy.HostBody[ps-model] = 0;
+     if (!strncmp(ps-2, "II-", 3))
+       ps -=2;
+-    strcpy(imHassy.Sensor, ps);
++    strncpy(imHassy.Sensor, ps,7);
++    imHassy.Sensor[7] = 0;
+     add_MP_toName = 0;
+   } else {                   // model contains host body only
+-    strcpy(imHassy.HostBody, model);
++    strncpy(imHassy.HostBody, model,63);
++    imHassy.HostBody[63] = 0;
+ // fill 'model' with sensor unit data
+-    strcpy(model, tmp_model);
++    strncpy(model, tmp_model,63);
++    model[63] = 0;
+   }
+ 
+   if (!strncmp(model, "503CWD", 6)) {
+-    strcpy(imHassy.HostBody, model);
++    strncpy(imHassy.HostBody, model,63);
++    imHassy.HostBody[63] = 0;
+     ilm.CameraFormat = LIBRAW_FORMAT_66;
+     ilm.CameraMount = LIBRAW_MOUNT_Hasselblad_V;
+     if (model[6] == 'I' && model[7] == 'I')

LibRaw.spec

@@ -7,7 +7,7 @@
 Summary: Library for reading RAW files obtained from digital photo cameras
 Name: LibRaw
 Version: 0.20.0
-Release: 2%{?dist}
+Release: 3%{?dist}
 License: BSD and (CDDL or LGPLv2)
 URL: http://www.libraw.org
 
@@ -20,6 +20,8 @@ BuildRequires: autoconf automake libtool
 #Source0: http://www.libraw.org/data/%{name}-%{version}.tar.gz
 Source0: http://github.com/LibRaw/LibRaw/archive/%{version}.tar.gz
 Patch0: LibRaw-pkgconfig.patch
+# For CVE-2020-24890
+Patch1: 78d323ecbe6a9752aee6e97118a76d40704d73ee.patch
 Provides: bundled(dcraw) = 9.25
 
 %description
@@ -114,6 +116,9 @@ rm -fv %{buildroot}%{_libdir}/lib*.la
 
 
 %changelog
+* Thu Sep 24 2020 Gwyn Ciesla <gwync@protonmail.com> - 0.20.0-3
+- Patch for CVE-2020-24890.
+
 * Mon Jul 27 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0.20.0-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild