Bug#1146408: trixie-pu: package unrar-nonfree/7.1.8-1+deb13u1

Bastian Germann <[email protected]>
Newsgroups gmane.linux.debian.devel.release
Message-ID <178827222875.14133.4947690233457994978.reportbug__40651.022950054$1788272370$gmane$org@duagon-BXN3S64.localdomain>
Package: release.debian.org
Severity: normal
Tags: trixie
X-Debbugs-Cc: [email protected]
Control: affects -1 + src:unrar-nonfree
User: [email protected]
Usertags: pu

[ Reason ]
Backport of non-DSA CVE-2026-14191.

[ Impact ]
Users are vulnerable to out-of-heap writes.

[ Tests ]
Only compile-tested and extracted one rar5 file.

[ Risks ]
Bounds checks for two variables are pretty trivial.

[ Checklist ]
  [x] *all* changes are documented in the d/changelog
  [x] I reviewed all changes and I approve them
  [x] attach debdiff against the package in (old)stable
  [x] the issue is verified as fixed in unstable

[ Changes ]
One patch backporting the changes in recvol5.cpp of v7.2.7 to 7.1.8.

[ Other info ]
Non-maintainer request.
unrar-nonfree_7.1.8-1+deb13u1.debdiff (text/plain, 1.9 KB)
diff -Nru unrar-nonfree-7.1.8/debian/changelog unrar-nonfree-7.1.8/debian/changelog
--- unrar-nonfree-7.1.8/debian/changelog	2025-06-27 03:34:13.000000000 +0200
+++ unrar-nonfree-7.1.8/debian/changelog	2026-09-01 16:05:21.000000000 +0200
@@ -1,3 +1,9 @@
+unrar-nonfree (1:7.1.8-1+deb13u1) trixie; urgency=medium
+
+  * Backport the fix for CVE-2026-14191
+
+ -- Bastian Germann <[email protected]>  Tue, 01 Sep 2026 16:05:21 +0200
+
 unrar-nonfree (1:7.1.8-1) unstable; urgency=medium
 
   * New upstream version 7.1.8
diff -Nru unrar-nonfree-7.1.8/debian/patches/0014-CVE-2026-14191.patch unrar-nonfree-7.1.8/debian/patches/0014-CVE-2026-14191.patch
--- unrar-nonfree-7.1.8/debian/patches/0014-CVE-2026-14191.patch	1970-01-01 01:00:00.000000000 +0100
+++ unrar-nonfree-7.1.8/debian/patches/0014-CVE-2026-14191.patch	2026-09-01 16:02:53.000000000 +0200
@@ -0,0 +1,23 @@
+Subject: Backport CVE-2026-14191 fix from version 7.2.7
+---
+--- a/recvol5.cpp
++++ b/recvol5.cpp
+@@ -460,9 +460,16 @@ uint RecVolumes5::ReadHeader(File *RecFile,bool FirstRev)
+ 
+   if (Raw.Get1()!=1) // Version check.
+     return 0;
+-  DataCount=Raw.Get2();
+-  RecCount=Raw.Get2();
++
++  uint CurDataCount=Raw.Get2();
++  uint CurRecCount=Raw.Get2();
++  if (!FirstRev && (CurDataCount!=DataCount || CurRecCount!=RecCount))
++    return 0;
++
++  DataCount=CurDataCount;
++  RecCount=CurRecCount;
+   TotalCount=DataCount+RecCount;
++
+   uint RecNum=Raw.Get2(); // Number of recovery volume.
+   if (RecNum>=TotalCount || TotalCount>MaxVolumes)
+     return 0;
diff -Nru unrar-nonfree-7.1.8/debian/patches/series unrar-nonfree-7.1.8/debian/patches/series
--- unrar-nonfree-7.1.8/debian/patches/series	2025-06-27 03:02:52.000000000 +0200
+++ unrar-nonfree-7.1.8/debian/patches/series	2026-09-01 16:04:43.000000000 +0200
@@ -11,3 +11,4 @@
 0011-Add-visibility-attribute-to-reduce-export-table.patch
 0012-Add-PHONY-target.patch
 0013-Avoid-internal-compiler-error-on-i386.patch
+0014-CVE-2026-14191.patch
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