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authorEfraim Flashner <efraim@flashner.co.il>2016-05-30 09:56:39 +0300
committerEfraim Flashner <efraim@flashner.co.il>2016-05-30 09:57:16 +0300
commit538884ccef762c3410bf2a75af236803eca6b024 (patch)
treec73593ccbacc92b9567a9df69e28d688048ac80f /gnu/packages/patches
parent9116f1269089ecf88ed9465498f7f9482dd978c6 (diff)
downloadguix-538884ccef762c3410bf2a75af236803eca6b024.tar.gz
gnu: jansson: Fix CVE-2016-4425.
* gnu/packages/web.scm (jansson)[source]: Add patch.
* gnu/packages/patches/jansson-CVE-2016-4425.patch: New variable.
* gnu/local.mk (dist_patch_DATA): Add it.
Diffstat (limited to 'gnu/packages/patches')
-rw-r--r--gnu/packages/patches/jansson-CVE-2016-4425.patch125
1 files changed, 125 insertions, 0 deletions
diff --git a/gnu/packages/patches/jansson-CVE-2016-4425.patch b/gnu/packages/patches/jansson-CVE-2016-4425.patch
new file mode 100644
index 0000000000..ebe9aa7809
--- /dev/null
+++ b/gnu/packages/patches/jansson-CVE-2016-4425.patch
@@ -0,0 +1,125 @@
+From 64ce0ad3731ebd77e02897b07920eadd0e2cc318 Mon Sep 17 00:00:00 2001
+From: Dmitry Janushkevich <gauri@tut.by>
+Date: Mon, 2 May 2016 13:59:26 +0200
+Subject: [PATCH] Fix for issue #282
+
+The fix limits recursion depths when parsing arrays and objects.
+The limit is configurable via the `JSON_PARSER_MAX_DEPTH` setting
+within `jansson_config.h` and is set by default to 2048.
+
+Update the RFC conformance document to note the limit; the RFC
+allows limits to be set by the implementation so nothing has
+actually changed w.r.t. conformance state.
+
+Reported by Gustavo Grieco.
+---
+ android/jansson_config.h                  |  4 ++++
+ cmake/jansson_config.h.cmake              |  4 ++++
+ doc/conformance.rst                       | 10 ++++++++++
+ src/jansson_config.h.in                   |  4 ++++
+ src/load.c                                | 10 ++++++++++
+ test/suites/invalid/recursion-depth/error |  2 ++
+ test/suites/invalid/recursion-depth/input |  1 +
+ 7 files changed, 35 insertions(+)
+ create mode 100644 test/suites/invalid/recursion-depth/error
+ create mode 100644 test/suites/invalid/recursion-depth/input
+
+--- a/android/jansson_config.h
++++ b/android/jansson_config.h
+@@ -36,4 +36,8 @@
+    otherwise to 0. */
+ #define JSON_HAVE_LOCALECONV 0
+ 
++/* Maximum recursion depth for parsing JSON input.
++   This limits the depth of e.g. array-within-array constructions. */
++#define JSON_PARSER_MAX_DEPTH 2048
++
+ #endif
+--- a/cmake/jansson_config.h.cmake
++++ b/cmake/jansson_config.h.cmake
+@@ -60,5 +60,9 @@
+ #define JSON_HAVE_LOCALECONV @JSON_HAVE_LOCALECONV@
+ 
+ 
++/* Maximum recursion depth for parsing JSON input.
++   This limits the depth of e.g. array-within-array constructions. */
++#define JSON_PARSER_MAX_DEPTH 2048
++
+ 
+ #endif
+--- a/doc/conformance.rst
++++ b/doc/conformance.rst
+@@ -108,3 +108,13 @@
+ are implicitly handled via the ordinary C type coercion rules (subject
+ to overflow semantics). Also, no support or hooks are provided for any
+ supplemental "bignum" type add-on packages.
++
++Depth of nested values
++----------------------
++
++To avoid stack exhaustion, Jansson currently limits the nesting depth
++for arrays and objects to a certain value (default: 2048), defined as
++a macro ``JSON_PARSER_MAX_DEPTH`` within ``jansson_config.h``.
++
++The limit is allowed to be set by the RFC; there is no recommended value
++or required minimum depth to be supported.
+--- a/src/jansson_config.h.in
++++ b/src/jansson_config.h.in
+@@ -36,4 +36,8 @@
+    otherwise to 0. */
+ #define JSON_HAVE_LOCALECONV @json_have_localeconv@
+ 
++/* Maximum recursion depth for parsing JSON input.
++   This limits the depth of e.g. array-within-array constructions. */
++#define JSON_PARSER_MAX_DEPTH 2048
++
+ #endif
+--- a/src/load.c
++++ b/src/load.c
+@@ -61,6 +61,7 @@
+ typedef struct {
+     stream_t stream;
+     strbuffer_t saved_text;
++    size_t depth;
+     int token;
+     union {
+         struct {
+@@ -800,6 +801,12 @@
+     json_t *json;
+     double value;
+ 
++    lex->depth++;
++    if(lex->depth > JSON_PARSER_MAX_DEPTH) {
++        error_set(error, lex, "maximum parsing depth reached");
++        return NULL;
++    }
++
+     switch(lex->token) {
+         case TOKEN_STRING: {
+             const char *value = lex->value.string.val;
+@@ -870,6 +877,7 @@
+     if(!json)
+         return NULL;
+ 
++    lex->depth--;
+     return json;
+ }
+ 
+@@ -877,6 +885,8 @@
+ {
+     json_t *result;
+ 
++    lex->depth = 0;
++
+     lex_scan(lex, error);
+     if(!(flags & JSON_DECODE_ANY)) {
+         if(lex->token != '[' && lex->token != '{') {
+--- /dev/null
++++ b/test/suites/invalid/recursion-depth/error
+@@ -0,0 +1,2 @@
++1 2049 2049
++maximum parsing depth reached near '['
+--- /dev/null
++++ b/test/suites/invalid/recursion-depth/input
+@@ -0,0 +1 @@
++[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[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