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author | Efraim Flashner <efraim@flashner.co.il> | 2016-05-30 09:56:39 +0300 |
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committer | Efraim Flashner <efraim@flashner.co.il> | 2016-05-30 09:57:16 +0300 |
commit | 538884ccef762c3410bf2a75af236803eca6b024 (patch) | |
tree | c73593ccbacc92b9567a9df69e28d688048ac80f /gnu/packages/patches/jansson-CVE-2016-4425.patch | |
parent | 9116f1269089ecf88ed9465498f7f9482dd978c6 (diff) | |
download | guix-patches-538884ccef762c3410bf2a75af236803eca6b024.tar guix-patches-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/jansson-CVE-2016-4425.patch')
-rw-r--r-- | gnu/packages/patches/jansson-CVE-2016-4425.patch | 125 |
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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