diff options
Diffstat (limited to 'meta/recipes-support/curl/curl/CVE-2020-8285.patch')
-rw-r--r-- | meta/recipes-support/curl/curl/CVE-2020-8285.patch | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/meta/recipes-support/curl/curl/CVE-2020-8285.patch b/meta/recipes-support/curl/curl/CVE-2020-8285.patch new file mode 100644 index 0000000000..8a0231ba84 --- /dev/null +++ b/meta/recipes-support/curl/curl/CVE-2020-8285.patch @@ -0,0 +1,257 @@ +From 69a358f2186e04cf44698b5100332cbf1ee7f01d Mon Sep 17 00:00:00 2001 +From: Daniel Stenberg <daniel@haxx.se> +Date: Sat, 28 Nov 2020 00:27:21 +0100 +Subject: [PATCH] ftp: make wc_statemach loop instead of recurse + +CVE-2020-8285 + +Fixes #6255 +Bug: https://curl.se/docs/CVE-2020-8285.html +Reported-by: xnynx on github + +Upstream-Status: Backport [https://github.com/curl/curl/commit/69a358f2186e04] + +CVE: CVE-2020-8285 + +Signed-off-by: Daniel Stenberg <daniel@haxx.se> +Signed-off-by: Khairul Rohaizzat Jamaluddin <khairul.rohaizzat.jamaluddin@intel.com> +--- + lib/ftp.c | 202 +++++++++++++++++++++++++++--------------------------- + 1 file changed, 102 insertions(+), 100 deletions(-) + +diff --git a/lib/ftp.c b/lib/ftp.c +index 50e7d7ddac9..bc355742172 100644 +--- a/lib/ftp.c ++++ b/lib/ftp.c +@@ -3800,129 +3800,131 @@ static CURLcode init_wc_data(struct connectdata *conn) + return result; + } + +-/* This is called recursively */ + static CURLcode wc_statemach(struct connectdata *conn) + { + struct WildcardData * const wildcard = &(conn->data->wildcard); + CURLcode result = CURLE_OK; + +- switch(wildcard->state) { +- case CURLWC_INIT: +- result = init_wc_data(conn); +- if(wildcard->state == CURLWC_CLEAN) +- /* only listing! */ +- break; +- wildcard->state = result ? CURLWC_ERROR : CURLWC_MATCHING; +- break; ++ for(;;) { ++ switch(wildcard->state) { ++ case CURLWC_INIT: ++ result = init_wc_data(conn); ++ if(wildcard->state == CURLWC_CLEAN) ++ /* only listing! */ ++ return result; ++ wildcard->state = result ? CURLWC_ERROR : CURLWC_MATCHING; ++ return result; + +- case CURLWC_MATCHING: { +- /* In this state is LIST response successfully parsed, so lets restore +- previous WRITEFUNCTION callback and WRITEDATA pointer */ +- struct ftp_wc *ftpwc = wildcard->protdata; +- conn->data->set.fwrite_func = ftpwc->backup.write_function; +- conn->data->set.out = ftpwc->backup.file_descriptor; +- ftpwc->backup.write_function = ZERO_NULL; +- ftpwc->backup.file_descriptor = NULL; +- wildcard->state = CURLWC_DOWNLOADING; +- +- if(Curl_ftp_parselist_geterror(ftpwc->parser)) { +- /* error found in LIST parsing */ +- wildcard->state = CURLWC_CLEAN; +- return wc_statemach(conn); +- } +- if(wildcard->filelist.size == 0) { +- /* no corresponding file */ +- wildcard->state = CURLWC_CLEAN; +- return CURLE_REMOTE_FILE_NOT_FOUND; ++ case CURLWC_MATCHING: { ++ /* In this state is LIST response successfully parsed, so lets restore ++ previous WRITEFUNCTION callback and WRITEDATA pointer */ ++ struct ftp_wc *ftpwc = wildcard->protdata; ++ conn->data->set.fwrite_func = ftpwc->backup.write_function; ++ conn->data->set.out = ftpwc->backup.file_descriptor; ++ ftpwc->backup.write_function = ZERO_NULL; ++ ftpwc->backup.file_descriptor = NULL; ++ wildcard->state = CURLWC_DOWNLOADING; ++ ++ if(Curl_ftp_parselist_geterror(ftpwc->parser)) { ++ /* error found in LIST parsing */ ++ wildcard->state = CURLWC_CLEAN; ++ continue; ++ } ++ if(wildcard->filelist.size == 0) { ++ /* no corresponding file */ ++ wildcard->state = CURLWC_CLEAN; ++ return CURLE_REMOTE_FILE_NOT_FOUND; ++ } ++ continue; + } +- return wc_statemach(conn); +- } + +- case CURLWC_DOWNLOADING: { +- /* filelist has at least one file, lets get first one */ +- struct ftp_conn *ftpc = &conn->proto.ftpc; +- struct curl_fileinfo *finfo = wildcard->filelist.head->ptr; +- struct FTP *ftp = conn->data->req.p.ftp; ++ case CURLWC_DOWNLOADING: { ++ /* filelist has at least one file, lets get first one */ ++ struct ftp_conn *ftpc = &conn->proto.ftpc; ++ struct curl_fileinfo *finfo = wildcard->filelist.head->ptr; ++ struct FTP *ftp = conn->data->req.p.ftp; + +- char *tmp_path = aprintf("%s%s", wildcard->path, finfo->filename); +- if(!tmp_path) +- return CURLE_OUT_OF_MEMORY; ++ char *tmp_path = aprintf("%s%s", wildcard->path, finfo->filename); ++ if(!tmp_path) ++ return CURLE_OUT_OF_MEMORY; + +- /* switch default ftp->path and tmp_path */ +- free(ftp->pathalloc); +- ftp->pathalloc = ftp->path = tmp_path; +- +- infof(conn->data, "Wildcard - START of \"%s\"\n", finfo->filename); +- if(conn->data->set.chunk_bgn) { +- long userresponse; +- Curl_set_in_callback(conn->data, true); +- userresponse = conn->data->set.chunk_bgn( +- finfo, wildcard->customptr, (int)wildcard->filelist.size); +- Curl_set_in_callback(conn->data, false); +- switch(userresponse) { +- case CURL_CHUNK_BGN_FUNC_SKIP: +- infof(conn->data, "Wildcard - \"%s\" skipped by user\n", +- finfo->filename); +- wildcard->state = CURLWC_SKIP; +- return wc_statemach(conn); +- case CURL_CHUNK_BGN_FUNC_FAIL: +- return CURLE_CHUNK_FAILED; ++ /* switch default ftp->path and tmp_path */ ++ free(ftp->pathalloc); ++ ftp->pathalloc = ftp->path = tmp_path; ++ ++ infof(conn->data, "Wildcard - START of \"%s\"\n", finfo->filename); ++ if(conn->data->set.chunk_bgn) { ++ long userresponse; ++ Curl_set_in_callback(conn->data, true); ++ userresponse = conn->data->set.chunk_bgn( ++ finfo, wildcard->customptr, (int)wildcard->filelist.size); ++ Curl_set_in_callback(conn->data, false); ++ switch(userresponse) { ++ case CURL_CHUNK_BGN_FUNC_SKIP: ++ infof(conn->data, "Wildcard - \"%s\" skipped by user\n", ++ finfo->filename); ++ wildcard->state = CURLWC_SKIP; ++ continue; ++ case CURL_CHUNK_BGN_FUNC_FAIL: ++ return CURLE_CHUNK_FAILED; ++ } + } +- } + +- if(finfo->filetype != CURLFILETYPE_FILE) { +- wildcard->state = CURLWC_SKIP; +- return wc_statemach(conn); +- } ++ if(finfo->filetype != CURLFILETYPE_FILE) { ++ wildcard->state = CURLWC_SKIP; ++ continue; ++ } + +- if(finfo->flags & CURLFINFOFLAG_KNOWN_SIZE) +- ftpc->known_filesize = finfo->size; ++ if(finfo->flags & CURLFINFOFLAG_KNOWN_SIZE) ++ ftpc->known_filesize = finfo->size; + +- result = ftp_parse_url_path(conn); +- if(result) +- return result; ++ result = ftp_parse_url_path(conn); ++ if(result) ++ return result; + +- /* we don't need the Curl_fileinfo of first file anymore */ +- Curl_llist_remove(&wildcard->filelist, wildcard->filelist.head, NULL); ++ /* we don't need the Curl_fileinfo of first file anymore */ ++ Curl_llist_remove(&wildcard->filelist, wildcard->filelist.head, NULL); + +- if(wildcard->filelist.size == 0) { /* remains only one file to down. */ +- wildcard->state = CURLWC_CLEAN; +- /* after that will be ftp_do called once again and no transfer +- will be done because of CURLWC_CLEAN state */ +- return CURLE_OK; ++ if(wildcard->filelist.size == 0) { /* remains only one file to down. */ ++ wildcard->state = CURLWC_CLEAN; ++ /* after that will be ftp_do called once again and no transfer ++ will be done because of CURLWC_CLEAN state */ ++ return CURLE_OK; ++ } ++ return result; + } +- } break; + +- case CURLWC_SKIP: { +- if(conn->data->set.chunk_end) { +- Curl_set_in_callback(conn->data, true); +- conn->data->set.chunk_end(conn->data->wildcard.customptr); +- Curl_set_in_callback(conn->data, false); ++ case CURLWC_SKIP: { ++ if(conn->data->set.chunk_end) { ++ Curl_set_in_callback(conn->data, true); ++ conn->data->set.chunk_end(conn->data->wildcard.customptr); ++ Curl_set_in_callback(conn->data, false); ++ } ++ Curl_llist_remove(&wildcard->filelist, wildcard->filelist.head, NULL); ++ wildcard->state = (wildcard->filelist.size == 0) ? ++ CURLWC_CLEAN : CURLWC_DOWNLOADING; ++ continue; + } +- Curl_llist_remove(&wildcard->filelist, wildcard->filelist.head, NULL); +- wildcard->state = (wildcard->filelist.size == 0) ? +- CURLWC_CLEAN : CURLWC_DOWNLOADING; +- return wc_statemach(conn); +- } + +- case CURLWC_CLEAN: { +- struct ftp_wc *ftpwc = wildcard->protdata; +- result = CURLE_OK; +- if(ftpwc) +- result = Curl_ftp_parselist_geterror(ftpwc->parser); ++ case CURLWC_CLEAN: { ++ struct ftp_wc *ftpwc = wildcard->protdata; ++ result = CURLE_OK; ++ if(ftpwc) ++ result = Curl_ftp_parselist_geterror(ftpwc->parser); + +- wildcard->state = result ? CURLWC_ERROR : CURLWC_DONE; +- } break; ++ wildcard->state = result ? CURLWC_ERROR : CURLWC_DONE; ++ return result; ++ } + +- case CURLWC_DONE: +- case CURLWC_ERROR: +- case CURLWC_CLEAR: +- if(wildcard->dtor) +- wildcard->dtor(wildcard->protdata); +- break; ++ case CURLWC_DONE: ++ case CURLWC_ERROR: ++ case CURLWC_CLEAR: ++ if(wildcard->dtor) ++ wildcard->dtor(wildcard->protdata); ++ return result; ++ } + } +- +- return result; ++ /* UNREACHABLE */ + } + + /*********************************************************************** |