From: saloni <saloni.j...@kpit.com> Added below CVE: CVE-2020-12825 Link: CVE-2020-12825 [https://gitlab.gnome.org/Archive/libcroco/-/commit/6eb257e5c731c691eb137fca94e916ca73941a5a] Link: https://gitlab.gnome.org/Archive/libcroco/-/issues/8
Signed-off-by: Saloni Jain <saloni.j...@kpit.com> Signed-off-by: Richard Purdie <richard.pur...@linuxfoundation.org> (cherry picked from commit f8cee7386c556e1c5adb07a0aee385642b7a5568) Signed-off-by: Anuj Mittal <anuj.mit...@intel.com> --- .../libcroco/files/CVE-2020-12825.patch | 192 ++++++++++++++++++ .../libcroco/libcroco_0.6.13.bb | 3 + 2 files changed, 195 insertions(+) create mode 100644 meta/recipes-support/libcroco/files/CVE-2020-12825.patch diff --git a/meta/recipes-support/libcroco/files/CVE-2020-12825.patch b/meta/recipes-support/libcroco/files/CVE-2020-12825.patch new file mode 100644 index 0000000000..42f92e3607 --- /dev/null +++ b/meta/recipes-support/libcroco/files/CVE-2020-12825.patch @@ -0,0 +1,192 @@ +From fdf78a4877afa987ba646a8779b513f258e6d04c Mon Sep 17 00:00:00 2001 +From: Michael Catanzaro <mcatanz...@gnome.org> +Date: Fri, 31 Jul 2020 15:21:53 -0500 +Subject: [PATCH] libcroco: Limit recursion in block and any productions + + (CVE-2020-12825) + +If we don't have any limits, we can recurse forever and overflow the +stack. + +Fixes #8 +This is per https://gitlab.gnome.org/Archive/libcroco/-/issues/8 + +https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1404 + +CVE: CVE-2020-12825 +Upstream-Status: Backport [https://gitlab.gnome.org/Archive/libcroco/-/commit/6eb257e5c731c691eb137fca94e916ca73941a5a] +Comment: No refreshing changes done. +Signed-off-by: Saloni Jain <saloni.j...@kpit.com> + +--- + src/cr-parser.c | 44 +++++++++++++++++++++++++++++--------------- + 1 file changed, 29 insertions(+), 15 deletions(-) + +diff --git a/src/cr-parser.c b/src/cr-parser.c +index 18c9a01..f4a62e3 100644 +--- a/src/cr-parser.c ++++ b/src/cr-parser.c +@@ -136,6 +136,8 @@ struct _CRParserPriv { + + #define CHARS_TAB_SIZE 12 + ++#define RECURSIVE_CALLERS_LIMIT 100 ++ + /** + * IS_NUM: + *@a_char: the char to test. +@@ -344,9 +346,11 @@ static enum CRStatus cr_parser_parse_selector_core (CRParser * a_this); + + static enum CRStatus cr_parser_parse_declaration_core (CRParser * a_this); + +-static enum CRStatus cr_parser_parse_any_core (CRParser * a_this); ++static enum CRStatus cr_parser_parse_any_core (CRParser * a_this, ++ guint n_calls); + +-static enum CRStatus cr_parser_parse_block_core (CRParser * a_this); ++static enum CRStatus cr_parser_parse_block_core (CRParser * a_this, ++ guint n_calls); + + static enum CRStatus cr_parser_parse_value_core (CRParser * a_this); + +@@ -784,7 +788,7 @@ cr_parser_parse_atrule_core (CRParser * a_this) + cr_parser_try_to_skip_spaces_and_comments (a_this); + + do { +- status = cr_parser_parse_any_core (a_this); ++ status = cr_parser_parse_any_core (a_this, 0); + } while (status == CR_OK); + + status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, +@@ -795,7 +799,7 @@ cr_parser_parse_atrule_core (CRParser * a_this) + cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, + token); + token = NULL; +- status = cr_parser_parse_block_core (a_this); ++ status = cr_parser_parse_block_core (a_this, 0); + CHECK_PARSING_STATUS (status, + FALSE); + goto done; +@@ -930,11 +934,11 @@ cr_parser_parse_selector_core (CRParser * a_this) + + RECORD_INITIAL_POS (a_this, &init_pos); + +- status = cr_parser_parse_any_core (a_this); ++ status = cr_parser_parse_any_core (a_this, 0); + CHECK_PARSING_STATUS (status, FALSE); + + do { +- status = cr_parser_parse_any_core (a_this); ++ status = cr_parser_parse_any_core (a_this, 0); + + } while (status == CR_OK); + +@@ -956,10 +960,12 @@ cr_parser_parse_selector_core (CRParser * a_this) + *in chapter 4.1 of the css2 spec. + *block ::= '{' S* [ any | block | ATKEYWORD S* | ';' ]* '}' S*; + *@param a_this the current instance of #CRParser. ++ *@param n_calls used to limit recursion depth + *FIXME: code this function. + */ + static enum CRStatus +-cr_parser_parse_block_core (CRParser * a_this) ++cr_parser_parse_block_core (CRParser * a_this, ++ guint n_calls) + { + CRToken *token = NULL; + CRInputPos init_pos; +@@ -967,6 +973,9 @@ cr_parser_parse_block_core (CRParser * a_this) + + g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR); + ++ if (n_calls > RECURSIVE_CALLERS_LIMIT) ++ return CR_ERROR; ++ + RECORD_INITIAL_POS (a_this, &init_pos); + + status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token); +@@ -996,13 +1005,13 @@ cr_parser_parse_block_core (CRParser * a_this) + } else if (token->type == CBO_TK) { + cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, token); + token = NULL; +- status = cr_parser_parse_block_core (a_this); ++ status = cr_parser_parse_block_core (a_this, n_calls + 1); + CHECK_PARSING_STATUS (status, FALSE); + goto parse_block_content; + } else { + cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, token); + token = NULL; +- status = cr_parser_parse_any_core (a_this); ++ status = cr_parser_parse_any_core (a_this, n_calls + 1); + CHECK_PARSING_STATUS (status, FALSE); + goto parse_block_content; + } +@@ -1109,7 +1118,7 @@ cr_parser_parse_value_core (CRParser * a_this) + status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, + token); + token = NULL; +- status = cr_parser_parse_block_core (a_this); ++ status = cr_parser_parse_block_core (a_this, 0); + CHECK_PARSING_STATUS (status, FALSE); + ref++; + goto continue_parsing; +@@ -1123,7 +1132,7 @@ cr_parser_parse_value_core (CRParser * a_this) + status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, + token); + token = NULL; +- status = cr_parser_parse_any_core (a_this); ++ status = cr_parser_parse_any_core (a_this, 0); + if (status == CR_OK) { + ref++; + goto continue_parsing; +@@ -1162,10 +1171,12 @@ cr_parser_parse_value_core (CRParser * a_this) + * | FUNCTION | DASHMATCH | '(' any* ')' | '[' any* ']' ] S*; + * + *@param a_this the current instance of #CRParser. ++ *@param n_calls used to limit recursion depth + *@return CR_OK upon successfull completion, an error code otherwise. + */ + static enum CRStatus +-cr_parser_parse_any_core (CRParser * a_this) ++cr_parser_parse_any_core (CRParser * a_this, ++ guint n_calls) + { + CRToken *token1 = NULL, + *token2 = NULL; +@@ -1174,6 +1185,9 @@ cr_parser_parse_any_core (CRParser * a_this) + + g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR); + ++ if (n_calls > RECURSIVE_CALLERS_LIMIT) ++ return CR_ERROR; ++ + RECORD_INITIAL_POS (a_this, &init_pos); + + status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token1); +@@ -1212,7 +1226,7 @@ cr_parser_parse_any_core (CRParser * a_this) + *We consider parameter as being an "any*" production. + */ + do { +- status = cr_parser_parse_any_core (a_this); ++ status = cr_parser_parse_any_core (a_this, n_calls + 1); + } while (status == CR_OK); + + ENSURE_PARSING_COND (status == CR_PARSING_ERROR); +@@ -1237,7 +1251,7 @@ cr_parser_parse_any_core (CRParser * a_this) + } + + do { +- status = cr_parser_parse_any_core (a_this); ++ status = cr_parser_parse_any_core (a_this, n_calls + 1); + } while (status == CR_OK); + + ENSURE_PARSING_COND (status == CR_PARSING_ERROR); +@@ -1265,7 +1279,7 @@ cr_parser_parse_any_core (CRParser * a_this) + } + + do { +- status = cr_parser_parse_any_core (a_this); ++ status = cr_parser_parse_any_core (a_this, n_calls + 1); + } while (status == CR_OK); + + ENSURE_PARSING_COND (status == CR_PARSING_ERROR); diff --git a/meta/recipes-support/libcroco/libcroco_0.6.13.bb b/meta/recipes-support/libcroco/libcroco_0.6.13.bb index 9171a9de5c..a443ff23fe 100644 --- a/meta/recipes-support/libcroco/libcroco_0.6.13.bb +++ b/meta/recipes-support/libcroco/libcroco_0.6.13.bb @@ -18,3 +18,6 @@ inherit gnomebase gtk-doc binconfig-disabled SRC_URI[archive.md5sum] = "c80c5a8385011a0260dce6bd0da93dce" SRC_URI[archive.sha256sum] = "767ec234ae7aa684695b3a735548224888132e063f92db585759b422570621d4" + +SRC_URI +="file://CVE-2020-12825.patch \ +" -- 2.29.2
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