From 22475de7fbc69014193b9907c89b502b999459cb Mon Sep 17 00:00:00 2001 From: Kamil Dudka Date: Wed, 29 Jun 2022 11:06:56 +0200 Subject: [PATCH] Resolves: CVE-2022-32207 - fix unpreserved file permissions --- 0019-curl-7.76.1-CVE-2022-32207.patch | 425 ++++++++++++++++++++++++++ curl.spec | 5 + 2 files changed, 430 insertions(+) create mode 100644 0019-curl-7.76.1-CVE-2022-32207.patch diff --git a/0019-curl-7.76.1-CVE-2022-32207.patch b/0019-curl-7.76.1-CVE-2022-32207.patch new file mode 100644 index 0000000..3d858d3 --- /dev/null +++ b/0019-curl-7.76.1-CVE-2022-32207.patch @@ -0,0 +1,425 @@ +From 36b47377c2d1a8d141d1ef810102748f27384f5c Mon Sep 17 00:00:00 2001 +From: Daniel Stenberg +Date: Wed, 25 May 2022 10:09:53 +0200 +Subject: [PATCH 1/3] fopen: add Curl_fopen() for better overwriting of files + +Bug: https://curl.se/docs/CVE-2022-32207.html +CVE-2022-32207 +Reported-by: Harry Sintonen +Closes #9050 + +Upstream-commit: 20f9dd6bae50b7223171b17ba7798946e74f877f +Signed-off-by: Kamil Dudka +--- + CMakeLists.txt | 1 + + configure.ac | 1 + + lib/Makefile.inc | 2 + + lib/cookie.c | 17 ++---- + lib/curl_config.h.cmake | 3 ++ + lib/fopen.c | 113 ++++++++++++++++++++++++++++++++++++++++ + lib/fopen.h | 30 +++++++++++ + 7 files changed, 154 insertions(+), 13 deletions(-) + create mode 100644 lib/fopen.c + create mode 100644 lib/fopen.h + +diff --git a/CMakeLists.txt b/CMakeLists.txt +index b77de6d..a0bfaad 100644 +--- a/CMakeLists.txt ++++ b/CMakeLists.txt +@@ -982,6 +982,7 @@ elseif(HAVE_LIBSOCKET) + set(CMAKE_REQUIRED_LIBRARIES socket) + endif() + ++check_symbol_exists(fchmod "${CURL_INCLUDES}" HAVE_FCHMOD) + check_symbol_exists(basename "${CURL_INCLUDES}" HAVE_BASENAME) + check_symbol_exists(socket "${CURL_INCLUDES}" HAVE_SOCKET) + check_symbol_exists(select "${CURL_INCLUDES}" HAVE_SELECT) +diff --git a/configure.ac b/configure.ac +index d431870..7433bb9 100644 +--- a/configure.ac ++++ b/configure.ac +@@ -4516,6 +4516,7 @@ AC_CHECK_DECLS([getpwuid_r], [], [AC_DEFINE(HAVE_DECL_GETPWUID_R_MISSING, 1, "Se + + + AC_CHECK_FUNCS([fnmatch \ ++ fchmod \ + geteuid \ + getpass_r \ + getppid \ +diff --git a/lib/Makefile.inc b/lib/Makefile.inc +index e8f110f..5139b03 100644 +--- a/lib/Makefile.inc ++++ b/lib/Makefile.inc +@@ -130,6 +130,7 @@ LIB_CFILES = \ + escape.c \ + file.c \ + fileinfo.c \ ++ fopen.c \ + formdata.c \ + ftp.c \ + ftplistparser.c \ +@@ -261,6 +262,7 @@ LIB_HFILES = \ + escape.h \ + file.h \ + fileinfo.h \ ++ fopen.h \ + formdata.h \ + ftp.h \ + ftplistparser.h \ +diff --git a/lib/cookie.c b/lib/cookie.c +index 8a6aa1a..cb0c03b 100644 +--- a/lib/cookie.c ++++ b/lib/cookie.c +@@ -97,8 +97,8 @@ Example set of cookies: + #include "curl_memrchr.h" + #include "inet_pton.h" + #include "parsedate.h" +-#include "rand.h" + #include "rename.h" ++#include "fopen.h" + + /* The last 3 #include files should be in this order */ + #include "curl_printf.h" +@@ -1537,17 +1537,8 @@ static int cookie_output(struct Curl_easy *data, + use_stdout = TRUE; + } + else { +- unsigned char randsuffix[9]; +- +- if(Curl_rand_hex(data, randsuffix, sizeof(randsuffix))) +- return 2; +- +- tempstore = aprintf("%s.%s.tmp", filename, randsuffix); +- if(!tempstore) +- return 1; +- +- out = fopen(tempstore, FOPEN_WRITETEXT); +- if(!out) ++ error = Curl_fopen(data, filename, &out, &tempstore); ++ if(error) + goto error; + } + +@@ -1594,7 +1585,7 @@ static int cookie_output(struct Curl_easy *data, + if(!use_stdout) { + fclose(out); + out = NULL; +- if(Curl_rename(tempstore, filename)) { ++ if(tempstore && Curl_rename(tempstore, filename)) { + unlink(tempstore); + goto error; + } +diff --git a/lib/curl_config.h.cmake b/lib/curl_config.h.cmake +index d2a0f43..c254359 100644 +--- a/lib/curl_config.h.cmake ++++ b/lib/curl_config.h.cmake +@@ -148,6 +148,9 @@ + /* Define to 1 if you have the header file. */ + #cmakedefine HAVE_ASSERT_H 1 + ++/* Define to 1 if you have the `fchmod' function. */ ++#cmakedefine HAVE_FCHMOD 1 ++ + /* Define to 1 if you have the `basename' function. */ + #cmakedefine HAVE_BASENAME 1 + +diff --git a/lib/fopen.c b/lib/fopen.c +new file mode 100644 +index 0000000..ad3691b +--- /dev/null ++++ b/lib/fopen.c +@@ -0,0 +1,113 @@ ++/*************************************************************************** ++ * _ _ ____ _ ++ * Project ___| | | | _ \| | ++ * / __| | | | |_) | | ++ * | (__| |_| | _ <| |___ ++ * \___|\___/|_| \_\_____| ++ * ++ * Copyright (C) 1998 - 2022, Daniel Stenberg, , et al. ++ * ++ * This software is licensed as described in the file COPYING, which ++ * you should have received as part of this distribution. The terms ++ * are also available at https://curl.se/docs/copyright.html. ++ * ++ * You may opt to use, copy, modify, merge, publish, distribute and/or sell ++ * copies of the Software, and permit persons to whom the Software is ++ * furnished to do so, under the terms of the COPYING file. ++ * ++ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY ++ * KIND, either express or implied. ++ * ++ * SPDX-License-Identifier: curl ++ * ++ ***************************************************************************/ ++ ++#include "curl_setup.h" ++ ++#if !defined(CURL_DISABLE_COOKIES) || !defined(CURL_DISABLE_ALTSVC) || \ ++ defined(USE_HSTS) ++ ++#ifdef HAVE_FCNTL_H ++#include ++#endif ++ ++#include "urldata.h" ++#include "rand.h" ++#include "fopen.h" ++/* The last 3 #include files should be in this order */ ++#include "curl_printf.h" ++#include "curl_memory.h" ++#include "memdebug.h" ++ ++/* ++ * Curl_fopen() opens a file for writing with a temp name, to be renamed ++ * to the final name when completed. If there is an existing file using this ++ * name at the time of the open, this function will clone the mode from that ++ * file. if 'tempname' is non-NULL, it needs a rename after the file is ++ * written. ++ */ ++CURLcode Curl_fopen(struct Curl_easy *data, const char *filename, ++ FILE **fh, char **tempname) ++{ ++ CURLcode result = CURLE_WRITE_ERROR; ++ unsigned char randsuffix[9]; ++ char *tempstore = NULL; ++ struct_stat sb; ++ int fd = -1; ++ *tempname = NULL; ++ ++ if(stat(filename, &sb) == -1 || !S_ISREG(sb.st_mode)) { ++ /* a non-regular file, fallback to direct fopen() */ ++ *fh = fopen(filename, FOPEN_WRITETEXT); ++ if(*fh) ++ return CURLE_OK; ++ goto fail; ++ } ++ ++ result = Curl_rand_hex(data, randsuffix, sizeof(randsuffix)); ++ if(result) ++ goto fail; ++ ++ tempstore = aprintf("%s.%s.tmp", filename, randsuffix); ++ if(!tempstore) { ++ result = CURLE_OUT_OF_MEMORY; ++ goto fail; ++ } ++ ++ result = CURLE_WRITE_ERROR; ++ fd = open(tempstore, O_WRONLY | O_CREAT | O_EXCL, 0600); ++ if(fd == -1) ++ goto fail; ++ ++#ifdef HAVE_FCHMOD ++ { ++ struct_stat nsb; ++ if((fstat(fd, &nsb) != -1) && ++ (nsb.st_uid == sb.st_uid) && (nsb.st_gid == sb.st_gid)) { ++ /* if the user and group are the same, clone the original mode */ ++ if(fchmod(fd, sb.st_mode) == -1) ++ goto fail; ++ } ++ } ++#endif ++ ++ *fh = fdopen(fd, FOPEN_WRITETEXT); ++ if(!*fh) ++ goto fail; ++ ++ *tempname = tempstore; ++ return CURLE_OK; ++ ++fail: ++ if(fd != -1) { ++ close(fd); ++ unlink(tempstore); ++ } ++ ++ free(tempstore); ++ ++ *tempname = NULL; ++ return result; ++} ++ ++#endif /* ! disabled */ +diff --git a/lib/fopen.h b/lib/fopen.h +new file mode 100644 +index 0000000..289e55f +--- /dev/null ++++ b/lib/fopen.h +@@ -0,0 +1,30 @@ ++#ifndef HEADER_CURL_FOPEN_H ++#define HEADER_CURL_FOPEN_H ++/*************************************************************************** ++ * _ _ ____ _ ++ * Project ___| | | | _ \| | ++ * / __| | | | |_) | | ++ * | (__| |_| | _ <| |___ ++ * \___|\___/|_| \_\_____| ++ * ++ * Copyright (C) 1998 - 2022, Daniel Stenberg, , et al. ++ * ++ * This software is licensed as described in the file COPYING, which ++ * you should have received as part of this distribution. The terms ++ * are also available at https://curl.se/docs/copyright.html. ++ * ++ * You may opt to use, copy, modify, merge, publish, distribute and/or sell ++ * copies of the Software, and permit persons to whom the Software is ++ * furnished to do so, under the terms of the COPYING file. ++ * ++ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY ++ * KIND, either express or implied. ++ * ++ * SPDX-License-Identifier: curl ++ * ++ ***************************************************************************/ ++ ++CURLcode Curl_fopen(struct Curl_easy *data, const char *filename, ++ FILE **fh, char **tempname); ++ ++#endif +-- +2.35.3 + + +From bd7af48238b058e9b46fdf2e1333b355920c341c Mon Sep 17 00:00:00 2001 +From: Daniel Stenberg +Date: Wed, 25 May 2022 10:09:53 +0200 +Subject: [PATCH 2/3] altsvc: use Curl_fopen() + +Upstream-commit: fab970a5d19c1faa2052239ec1e2602b892cbeb2 +Signed-off-by: Kamil Dudka +--- + lib/altsvc.c | 22 ++++++---------------- + 1 file changed, 6 insertions(+), 16 deletions(-) + +diff --git a/lib/altsvc.c b/lib/altsvc.c +index 242733b..4dc4078 100644 +--- a/lib/altsvc.c ++++ b/lib/altsvc.c +@@ -34,7 +34,7 @@ + #include "parsedate.h" + #include "sendf.h" + #include "warnless.h" +-#include "rand.h" ++#include "fopen.h" + #include "rename.h" + + /* The last 3 #include files should be in this order */ +@@ -329,8 +329,7 @@ CURLcode Curl_altsvc_save(struct Curl_easy *data, + struct Curl_llist_element *n; + CURLcode result = CURLE_OK; + FILE *out; +- char *tempstore; +- unsigned char randsuffix[9]; ++ char *tempstore = NULL; + + if(!altsvc) + /* no cache activated */ +@@ -344,17 +343,8 @@ CURLcode Curl_altsvc_save(struct Curl_easy *data, + /* marked as read-only, no file or zero length file name */ + return CURLE_OK; + +- if(Curl_rand_hex(data, randsuffix, sizeof(randsuffix))) +- return CURLE_FAILED_INIT; +- +- tempstore = aprintf("%s.%s.tmp", file, randsuffix); +- if(!tempstore) +- return CURLE_OUT_OF_MEMORY; +- +- out = fopen(tempstore, FOPEN_WRITETEXT); +- if(!out) +- result = CURLE_WRITE_ERROR; +- else { ++ result = Curl_fopen(data, file, &out, &tempstore); ++ if(!result) { + fputs("# Your alt-svc cache. https://curl.se/docs/alt-svc.html\n" + "# This file was generated by libcurl! Edit at your own risk.\n", + out); +@@ -366,10 +356,10 @@ CURLcode Curl_altsvc_save(struct Curl_easy *data, + break; + } + fclose(out); +- if(!result && Curl_rename(tempstore, file)) ++ if(!result && tempstore && Curl_rename(tempstore, file)) + result = CURLE_WRITE_ERROR; + +- if(result) ++ if(result && tempstore) + unlink(tempstore); + } + free(tempstore); +-- +2.35.3 + + +From 2011622a36fa715f38277422241e77e25dfdf0d0 Mon Sep 17 00:00:00 2001 +From: Daniel Stenberg +Date: Wed, 25 May 2022 10:09:54 +0200 +Subject: [PATCH 3/3] hsts: use Curl_fopen() + +Upstream-commit: d64115d7bb8ae4c136b620912da523c063f1d2ee +Signed-off-by: Kamil Dudka +--- + lib/hsts.c | 22 ++++++---------------- + 1 file changed, 6 insertions(+), 16 deletions(-) + +diff --git a/lib/hsts.c b/lib/hsts.c +index b9fa6f7..9d54c82 100644 +--- a/lib/hsts.c ++++ b/lib/hsts.c +@@ -35,7 +35,7 @@ + #include "sendf.h" + #include "strtoofft.h" + #include "parsedate.h" +-#include "rand.h" ++#include "fopen.h" + #include "rename.h" + + /* The last 3 #include files should be in this order */ +@@ -316,8 +316,7 @@ CURLcode Curl_hsts_save(struct Curl_easy *data, struct hsts *h, + struct Curl_llist_element *n; + CURLcode result = CURLE_OK; + FILE *out; +- char *tempstore; +- unsigned char randsuffix[9]; ++ char *tempstore = NULL; + + if(!h) + /* no cache activated */ +@@ -331,17 +330,8 @@ CURLcode Curl_hsts_save(struct Curl_easy *data, struct hsts *h, + /* marked as read-only, no file or zero length file name */ + goto skipsave; + +- if(Curl_rand_hex(data, randsuffix, sizeof(randsuffix))) +- return CURLE_FAILED_INIT; +- +- tempstore = aprintf("%s.%s.tmp", file, randsuffix); +- if(!tempstore) +- return CURLE_OUT_OF_MEMORY; +- +- out = fopen(tempstore, FOPEN_WRITETEXT); +- if(!out) +- result = CURLE_WRITE_ERROR; +- else { ++ result = Curl_fopen(data, file, &out, &tempstore); ++ if(!result) { + fputs("# Your HSTS cache. https://curl.se/docs/hsts.html\n" + "# This file was generated by libcurl! Edit at your own risk.\n", + out); +@@ -353,10 +343,10 @@ CURLcode Curl_hsts_save(struct Curl_easy *data, struct hsts *h, + break; + } + fclose(out); +- if(!result && Curl_rename(tempstore, file)) ++ if(!result && tempstore && Curl_rename(tempstore, file)) + result = CURLE_WRITE_ERROR; + +- if(result) ++ if(result && tempstore) + unlink(tempstore); + } + free(tempstore); +-- +2.35.3 + diff --git a/curl.spec b/curl.spec index 649b902..fcc5afb 100644 --- a/curl.spec +++ b/curl.spec @@ -56,6 +56,9 @@ Patch16: 0016-curl-7.76.1-CVE-2022-32208.patch # fix HTTP compression denial of service (CVE-2022-32206) Patch17: 0017-curl-7.76.1-CVE-2022-32206.patch +# fix unpreserved file permissions (CVE-2022-32207) +Patch19: 0019-curl-7.76.1-CVE-2022-32207.patch + # patch making libcurl multilib ready Patch101: 0101-curl-7.32.0-multilib.patch @@ -248,6 +251,7 @@ be installed. %patch15 -p1 %patch16 -p1 %patch17 -p1 +%patch19 -p1 # Fedora patches %patch101 -p1 @@ -469,6 +473,7 @@ rm -f ${RPM_BUILD_ROOT}%{_libdir}/libcurl.la %changelog * Wed Jun 29 2022 Kamil Dudka - 7.76.1-19 +- fix unpreserved file permissions (CVE-2022-32207) - fix HTTP compression denial of service (CVE-2022-32206) - fix FTP-KRB bad message verification (CVE-2022-32208)