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-rw-r--r--patches/source/glibc/glibc-2.17_CVE-2013-4332.diff64
1 files changed, 64 insertions, 0 deletions
diff --git a/patches/source/glibc/glibc-2.17_CVE-2013-4332.diff b/patches/source/glibc/glibc-2.17_CVE-2013-4332.diff
new file mode 100644
index 00000000..9f7f5886
--- /dev/null
+++ b/patches/source/glibc/glibc-2.17_CVE-2013-4332.diff
@@ -0,0 +1,64 @@
+From 0d6085cb1b4330b835ad08a3ec8f80b30f0cadb4 Mon Sep 17 00:00:00 2001
+From: mancha <mancha1@hush.com>
+Date: Wed, 11 Sep 2013
+Subject: CVE-2013-4332
+
+malloc: Check for integer overflow in pvalloc, valloc, and memalign.
+
+A large bytes parameter to pvalloc, valloc, or memalign could cause
+an integer overflow and corrupt allocator internals. Check the
+overflow does not occur before continuing with the allocation.
+
+Note: This is a backport to glibc 2.17 of the following three commits:
+ * https://sourceware.org/git/?p=glibc.git;a=commit;h=1159a193696a
+ * https://sourceware.org/git/?p=glibc.git;a=commit;h=55e17aadc1ef
+ * https://sourceware.org/git/?p=glibc.git;a=commit;h=b73ed247781d
+---
+
+malloc.c | 21 +++++++++++++++++++++
+ 1 file changed, 21 insertions(+)
+
+--- a/malloc/malloc.c
++++ b/malloc/malloc.c
+@@ -3020,6 +3020,13 @@ __libc_memalign(size_t alignment, size_t
+ /* Otherwise, ensure that it is at least a minimum chunk size */
+ if (alignment < MINSIZE) alignment = MINSIZE;
+
++ /* Check for overflow. */
++ if (bytes > SIZE_MAX - alignment - MINSIZE)
++ {
++ __set_errno (ENOMEM);
++ return 0;
++ }
++
+ arena_get(ar_ptr, bytes + alignment + MINSIZE);
+ if(!ar_ptr)
+ return 0;
+@@ -3051,6 +3058,13 @@ __libc_valloc(size_t bytes)
+
+ size_t pagesz = GLRO(dl_pagesize);
+
++ /* Check for overflow. */
++ if (bytes > SIZE_MAX - pagesz - MINSIZE)
++ {
++ __set_errno (ENOMEM);
++ return 0;
++ }
++
+ __malloc_ptr_t (*hook) __MALLOC_PMT ((size_t, size_t,
+ const __malloc_ptr_t)) =
+ force_reg (__memalign_hook);
+@@ -3088,6 +3102,13 @@ __libc_pvalloc(size_t bytes)
+ size_t page_mask = GLRO(dl_pagesize) - 1;
+ size_t rounded_bytes = (bytes + page_mask) & ~(page_mask);
+
++ /* Check for overflow. */
++ if (bytes > SIZE_MAX - 2*pagesz - MINSIZE)
++ {
++ __set_errno (ENOMEM);
++ return 0;
++ }
++
+ __malloc_ptr_t (*hook) __MALLOC_PMT ((size_t, size_t,
+ const __malloc_ptr_t)) =
+ force_reg (__memalign_hook);