main/aspell: add mitigation for CVE-2019-25051 / OSV-2020-521

main/aspell/APKBUILD

@@ -2,7 +2,7 @@
 # Contributor: Valery Kartel <valery.kartel@gmail.com>
 pkgname=aspell
 pkgver=0.60.8
-pkgrel=0
+pkgrel=1
 pkgdesc="A spell checker designed to eventually replace Ispell"
 url="http://aspell.net/"
 arch="all"
@@ -11,11 +11,15 @@ subpackages="$pkgname-compat::noarch $pkgname-utils $pkgname-dev $pkgname-doc
 	$pkgname-lang $pkgname-libs"
 depends_dev="$pkgname-utils"
 makedepends="ncurses-dev perl gettext-dev"
-source="https://ftp.gnu.org/gnu/aspell/aspell-$pkgver.tar.gz"
+source="https://ftp.gnu.org/gnu/aspell/aspell-$pkgver.tar.gz
+	CVE-2019-25051.patch"
 
 # secfixes:
+#   0.60.8-r1:
+#     - CVE-2019-25051
 #   0.60.8-r0:
 #     - CVE-2019-17544
+
 prepare() {
 	default_prepare
 	update_config_sub
@@ -67,4 +71,7 @@ libs() {
 	rm -fr "$pkgdir"/usr/lib
 }
 
-sha512sums="8ef4952c553b6234dfe777240d2d97beb13ef9201e18d56bee3b5068d13525db3625b7130d9f5122f7c529da0ccb0c70eb852a81472a7d15fb7c4ee5ba21cd29  aspell-0.60.8.tar.gz"
+sha512sums="
+8ef4952c553b6234dfe777240d2d97beb13ef9201e18d56bee3b5068d13525db3625b7130d9f5122f7c529da0ccb0c70eb852a81472a7d15fb7c4ee5ba21cd29  aspell-0.60.8.tar.gz
+529f3f4737d2e19f7571f4c8666b1cd089cc4e9dfdaa52dc468919f01ce9f8f8112d8fe8afda295b3dfb92f5e0c2bbd79bf1ec69f06c163c32eb28f0168ab263  CVE-2019-25051.patch
+"

main/aspell/CVE-2019-25051.patch

@@ -0,0 +1,96 @@
+From 0718b375425aad8e54e1150313b862e4c6fd324a Mon Sep 17 00:00:00 2001
+From: Kevin Atkinson <kevina@gnu.org>
+Date: Sat, 21 Dec 2019 20:32:47 +0000
+Subject: [PATCH] objstack: assert that the alloc size will fit within a chunk
+ to prevent a buffer overflow
+
+Bug found using OSS-Fuze.
+---
+ common/objstack.hpp | 18 ++++++++++++++----
+ 1 file changed, 14 insertions(+), 4 deletions(-)
+
+diff --git a/common/objstack.hpp b/common/objstack.hpp
+index 3997bf7..bd97ccd 100644
+--- a/common/objstack.hpp
++++ b/common/objstack.hpp
+@@ -5,6 +5,7 @@
+ #include "parm_string.hpp"
+ #include <stdlib.h>
+ #include <assert.h>
++#include <stddef.h>
+ 
+ namespace acommon {
+ 
+@@ -26,6 +27,12 @@ class ObjStack
+   byte * temp_end;
+   void setup_chunk();
+   void new_chunk();
++  bool will_overflow(size_t sz) const {
++    return offsetof(Node,data) + sz > chunk_size;
++  }
++  void check_size(size_t sz) {
++    assert(!will_overflow(sz));
++  }
+ 
+   ObjStack(const ObjStack &);
+   void operator=(const ObjStack &);
+@@ -56,7 +63,7 @@ class ObjStack
+   void * alloc_bottom(size_t size)  {
+     byte * tmp = bottom;
+     bottom += size;
+-    if (bottom > top) {new_chunk(); tmp = bottom; bottom += size;}
++    if (bottom > top) {check_size(size); new_chunk(); tmp = bottom; bottom += size;}
+     return tmp;
+   }
+   // This alloc_bottom will insure that the object is aligned based on the
+@@ -66,7 +73,7 @@ class ObjStack
+     align_bottom(align);
+     byte * tmp = bottom;
+     bottom += size;
+-    if (bottom > top) {new_chunk(); goto loop;}
++    if (bottom > top) {check_size(size); new_chunk(); goto loop;}
+     return tmp;
+   }
+   char * dup_bottom(ParmString str) {
+@@ -79,7 +86,7 @@ class ObjStack
+   // always be aligned as such.
+   void * alloc_top(size_t size) {
+     top -= size;
+-    if (top < bottom) {new_chunk(); top -= size;}
++    if (top < bottom) {check_size(size); new_chunk(); top -= size;}
+     return top;
+   }
+   // This alloc_top will insure that the object is aligned based on
+@@ -88,7 +95,7 @@ class ObjStack
+   {loop:
+     top -= size;
+     align_top(align);
+-    if (top < bottom) {new_chunk(); goto loop;}
++    if (top < bottom) {check_size(size); new_chunk(); goto loop;}
+     return top;
+   }
+   char * dup_top(ParmString str) {
+@@ -117,6 +124,7 @@ class ObjStack
+   void * alloc_temp(size_t size) {
+     temp_end = bottom + size;
+     if (temp_end > top) {
++      check_size(size);
+       new_chunk();
+       temp_end = bottom + size;
+     }
+@@ -131,6 +139,7 @@ class ObjStack
+     } else {
+       size_t s = temp_end - bottom;
+       byte * p = bottom;
++      check_size(size);
+       new_chunk();
+       memcpy(bottom, p, s);
+       temp_end = bottom + size;
+@@ -150,6 +159,7 @@ class ObjStack
+     } else {
+       size_t s = temp_end - bottom;
+       byte * p = bottom;
++      check_size(size);
+       new_chunk();
+       memcpy(bottom, p, s);
+       temp_end = bottom + size;