diff options
Diffstat (limited to 'gnu/packages/patches/glibc-CVE-2012-3406.patch')
| -rw-r--r-- | gnu/packages/patches/glibc-CVE-2012-3406.patch | 282 |
1 files changed, 0 insertions, 282 deletions
diff --git a/gnu/packages/patches/glibc-CVE-2012-3406.patch b/gnu/packages/patches/glibc-CVE-2012-3406.patch deleted file mode 100644 index 9147a2aeee..0000000000 --- a/gnu/packages/patches/glibc-CVE-2012-3406.patch +++ /dev/null @@ -1,282 +0,0 @@ -Fix CVE-2012-3406: Stack overflow in vfprintf [BZ #16617] - -Note: Here the ChangeLog and NEWS updates are removed from Jeff's - patch, since they depend on other earlier commits. - -From: Jeff Law <law@redhat.com> -Date: Mon, 15 Dec 2014 09:09:32 +0000 (+0100) -Subject: CVE-2012-3406: Stack overflow in vfprintf [BZ #16617] -X-Git-Url: https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff_plain;h=a3a1f4163c4d0f9a36056c8640661a88674ae8a2 - -CVE-2012-3406: Stack overflow in vfprintf [BZ #16617] - -A larger number of format specifiers coudld cause a stack overflow, -potentially allowing to bypass _FORTIFY_SOURCE format string -protection. - -(cherry picked from commit a5357b7ce2a2982c5778435704bcdb55ce3667a0) -(cherry picked from commit ae61fc7b33d9d99d2763c16de8275227dc9748ba) - -Conflicts: - NEWS ---- - -diff --git a/stdio-common/Makefile b/stdio-common/Makefile -index 5f8e534..e5e45b6 100644 ---- a/stdio-common/Makefile -+++ b/stdio-common/Makefile -@@ -57,7 +57,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \ - bug19 bug19a tst-popen2 scanf13 scanf14 scanf15 bug20 bug21 bug22 \ - scanf16 scanf17 tst-setvbuf1 tst-grouping bug23 bug24 \ - bug-vfprintf-nargs tst-long-dbl-fphex tst-fphex-wide tst-sprintf3 \ -- bug25 tst-printf-round bug26 -+ bug25 tst-printf-round bug23-2 bug23-3 bug23-4 bug26 - - test-srcs = tst-unbputc tst-printf - -diff --git a/stdio-common/bug23-2.c b/stdio-common/bug23-2.c -new file mode 100644 -index 0000000..9e0cfe6 ---- /dev/null -+++ b/stdio-common/bug23-2.c -@@ -0,0 +1,70 @@ -+#include <stdio.h> -+#include <string.h> -+#include <stdlib.h> -+ -+static const char expected[] = "\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55\ -+\n\ -+a\n\ -+abbcd55%%%%%%%%%%%%%%%%%%%%%%%%%%\n"; -+ -+static int -+do_test (void) -+{ -+ char *buf = malloc (strlen (expected) + 1); -+ snprintf (buf, strlen (expected) + 1, -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ "%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n", -+ "a", "b", "c", "d", 5); -+ return strcmp (buf, expected) != 0; -+} -+ -+#define TEST_FUNCTION do_test () -+#include "../test-skeleton.c" -diff --git a/stdio-common/bug23-3.c b/stdio-common/bug23-3.c -new file mode 100644 -index 0000000..57c8cef ---- /dev/null -+++ b/stdio-common/bug23-3.c -@@ -0,0 +1,50 @@ -+#include <stdio.h> -+#include <string.h> -+#include <stdlib.h> -+ -+int -+do_test (void) -+{ -+ size_t instances = 16384; -+#define X0 "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d" -+ const char *item = "\na\nabbcd55"; -+#define X3 X0 X0 X0 X0 X0 X0 X0 X0 -+#define X6 X3 X3 X3 X3 X3 X3 X3 X3 -+#define X9 X6 X6 X6 X6 X6 X6 X6 X6 -+#define X12 X9 X9 X9 X9 X9 X9 X9 X9 -+#define X14 X12 X12 X12 X12 -+#define TRAILER "%%%%%%%%%%%%%%%%%%%%%%%%%%" -+#define TRAILER2 TRAILER TRAILER -+ size_t length = instances * strlen (item) + strlen (TRAILER) + 1; -+ -+ char *buf = malloc (length + 1); -+ snprintf (buf, length + 1, -+ X14 TRAILER2 "\n", -+ "a", "b", "c", "d", 5); -+ -+ const char *p = buf; -+ size_t i; -+ for (i = 0; i < instances; ++i) -+ { -+ const char *expected; -+ for (expected = item; *expected; ++expected) -+ { -+ if (*p != *expected) -+ { -+ printf ("mismatch at offset %zu (%zu): expected %d, got %d\n", -+ (size_t) (p - buf), i, *expected & 0xFF, *p & 0xFF); -+ return 1; -+ } -+ ++p; -+ } -+ } -+ if (strcmp (p, TRAILER "\n") != 0) -+ { -+ printf ("mismatch at trailer: [%s]\n", p); -+ return 1; -+ } -+ free (buf); -+ return 0; -+} -+#define TEST_FUNCTION do_test () -+#include "../test-skeleton.c" -diff --git a/stdio-common/bug23-4.c b/stdio-common/bug23-4.c -new file mode 100644 -index 0000000..a478564 ---- /dev/null -+++ b/stdio-common/bug23-4.c -@@ -0,0 +1,31 @@ -+#include <stdio.h> -+#include <stdlib.h> -+#include <string.h> -+#include <sys/resource.h> -+ -+#define LIMIT 1000000 -+ -+int -+main (void) -+{ -+ struct rlimit lim; -+ getrlimit (RLIMIT_STACK, &lim); -+ lim.rlim_cur = 1048576; -+ setrlimit (RLIMIT_STACK, &lim); -+ char *fmtstr = malloc (4 * LIMIT + 1); -+ if (fmtstr == NULL) -+ abort (); -+ char *output = malloc (LIMIT + 1); -+ if (output == NULL) -+ abort (); -+ for (size_t i = 0; i < LIMIT; i++) -+ memcpy (fmtstr + 4 * i, "%1$d", 4); -+ fmtstr[4 * LIMIT] = '\0'; -+ int ret = snprintf (output, LIMIT + 1, fmtstr, 0); -+ if (ret != LIMIT) -+ abort (); -+ for (size_t i = 0; i < LIMIT; i++) -+ if (output[i] != '0') -+ abort (); -+ return 0; -+} -diff --git a/stdio-common/vfprintf.c b/stdio-common/vfprintf.c -index c4ff833..429a3d1 100644 ---- a/stdio-common/vfprintf.c -+++ b/stdio-common/vfprintf.c -@@ -263,6 +263,12 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap) - /* For the argument descriptions, which may be allocated on the heap. */ - void *args_malloced = NULL; - -+ /* For positional argument handling. */ -+ struct printf_spec *specs; -+ -+ /* Track if we malloced the SPECS array and thus must free it. */ -+ bool specs_malloced = false; -+ - /* This table maps a character into a number representing a - class. In each step there is a destination label for each - class. */ -@@ -1679,8 +1685,8 @@ do_positional: - size_t nspecs = 0; - /* A more or less arbitrary start value. */ - size_t nspecs_size = 32 * sizeof (struct printf_spec); -- struct printf_spec *specs = alloca (nspecs_size); - -+ specs = alloca (nspecs_size); - /* The number of arguments the format string requests. This will - determine the size of the array needed to store the argument - attributes. */ -@@ -1721,11 +1727,39 @@ do_positional: - if (nspecs * sizeof (*specs) >= nspecs_size) - { - /* Extend the array of format specifiers. */ -+ if (nspecs_size * 2 < nspecs_size) -+ { -+ __set_errno (ENOMEM); -+ done = -1; -+ goto all_done; -+ } - struct printf_spec *old = specs; -- specs = extend_alloca (specs, nspecs_size, 2 * nspecs_size); -+ if (__libc_use_alloca (2 * nspecs_size)) -+ specs = extend_alloca (specs, nspecs_size, 2 * nspecs_size); -+ else -+ { -+ nspecs_size *= 2; -+ specs = malloc (nspecs_size); -+ if (specs == NULL) -+ { -+ __set_errno (ENOMEM); -+ specs = old; -+ done = -1; -+ goto all_done; -+ } -+ } - - /* Copy the old array's elements to the new space. */ - memmove (specs, old, nspecs * sizeof (*specs)); -+ -+ /* If we had previously malloc'd space for SPECS, then -+ release it after the copy is complete. */ -+ if (specs_malloced) -+ free (old); -+ -+ /* Now set SPECS_MALLOCED if needed. */ -+ if (!__libc_use_alloca (nspecs_size)) -+ specs_malloced = true; - } - - /* Parse the format specifier. */ -@@ -2046,6 +2080,8 @@ do_positional: - } - - all_done: -+ if (specs_malloced) -+ free (specs); - if (__glibc_unlikely (args_malloced != NULL)) - free (args_malloced); - if (__glibc_unlikely (workstart != NULL)) |