diff --git a/0027-curl-7.76.1-CVE-2023-27535.patch b/0027-curl-7.76.1-CVE-2023-27535.patch new file mode 100644 index 0000000..219fccd --- /dev/null +++ b/0027-curl-7.76.1-CVE-2023-27535.patch @@ -0,0 +1,237 @@ +From e8705acd69383c13191c9dd4867d5118e58c54ba Mon Sep 17 00:00:00 2001 +From: Daniel Stenberg +Date: Thu, 6 Oct 2022 00:49:10 +0200 +Subject: [PATCH 1/2] strcase: add Curl_timestrcmp + +This is a strcmp() alternative function for comparing "secrets", +designed to take the same time no matter the content to not leak +match/non-match info to observers based on how fast it is. + +The time this function takes is only a function of the shortest input +string. + +Reported-by: Trail of Bits + +Closes #9658 + +Upstream-commit: ed5095ed94281989e103c72e032200b83be37878 +Signed-off-by: Kamil Dudka +--- + lib/strcase.c | 22 ++++++++++++++++++++++ + lib/strcase.h | 1 + + 2 files changed, 23 insertions(+) + +diff --git a/lib/strcase.c b/lib/strcase.c +index f932485..c73907d 100644 +--- a/lib/strcase.c ++++ b/lib/strcase.c +@@ -261,6 +261,28 @@ bool Curl_safecmp(char *a, char *b) + return !a && !b; + } + ++/* ++ * Curl_timestrcmp() returns 0 if the two strings are identical. The time this ++ * function spends is a function of the shortest string, not of the contents. ++ */ ++int Curl_timestrcmp(const char *a, const char *b) ++{ ++ int match = 0; ++ int i = 0; ++ ++ if(a && b) { ++ while(1) { ++ match |= a[i]^b[i]; ++ if(!a[i] || !b[i]) ++ break; ++ i++; ++ } ++ } ++ else ++ return a || b; ++ return match; ++} ++ + /* --- public functions --- */ + + int curl_strequal(const char *first, const char *second) +diff --git a/lib/strcase.h b/lib/strcase.h +index d245929..11a67a1 100644 +--- a/lib/strcase.h ++++ b/lib/strcase.h +@@ -49,5 +49,6 @@ void Curl_strntoupper(char *dest, const char *src, size_t n); + void Curl_strntolower(char *dest, const char *src, size_t n); + + bool Curl_safecmp(char *a, char *b); ++int Curl_timestrcmp(const char *first, const char *second); + + #endif /* HEADER_CURL_STRCASE_H */ +-- +2.39.2 + + +From 9cfaea212ff347937a38f6b5d6b885ed8ba1b931 Mon Sep 17 00:00:00 2001 +From: Daniel Stenberg +Date: Thu, 9 Mar 2023 17:47:06 +0100 +Subject: [PATCH 2/2] ftp: add more conditions for connection reuse + +Reported-by: Harry Sintonen +Closes #10730 + +Upstream-commit: 8f4608468b890dce2dad9f91d5607ee7e9c1aba1 +Signed-off-by: Kamil Dudka +--- + lib/ftp.c | 28 ++++++++++++++++++++++++++-- + lib/ftp.h | 5 +++++ + lib/setopt.c | 2 +- + lib/url.c | 16 +++++++++++++++- + lib/urldata.h | 4 ++-- + 5 files changed, 49 insertions(+), 6 deletions(-) + +diff --git a/lib/ftp.c b/lib/ftp.c +index 9442832..df15bc0 100644 +--- a/lib/ftp.c ++++ b/lib/ftp.c +@@ -4086,6 +4086,8 @@ static CURLcode ftp_disconnect(struct Curl_easy *data, + } + + freedirs(ftpc); ++ Curl_safefree(ftpc->account); ++ Curl_safefree(ftpc->alternative_to_user); + Curl_safefree(ftpc->prevpath); + Curl_safefree(ftpc->server_os); + Curl_pp_disconnect(pp); +@@ -4346,11 +4348,31 @@ static CURLcode ftp_setup_connection(struct Curl_easy *data, + { + char *type; + struct FTP *ftp; ++ struct ftp_conn *ftpc = &conn->proto.ftpc; + +- data->req.p.ftp = ftp = calloc(sizeof(struct FTP), 1); ++ ftp = calloc(sizeof(struct FTP), 1); + if(NULL == ftp) + return CURLE_OUT_OF_MEMORY; + ++ /* clone connection related data that is FTP specific */ ++ if(data->set.str[STRING_FTP_ACCOUNT]) { ++ ftpc->account = strdup(data->set.str[STRING_FTP_ACCOUNT]); ++ if(!ftpc->account) { ++ free(ftp); ++ return CURLE_OUT_OF_MEMORY; ++ } ++ } ++ if(data->set.str[STRING_FTP_ALTERNATIVE_TO_USER]) { ++ ftpc->alternative_to_user = ++ strdup(data->set.str[STRING_FTP_ALTERNATIVE_TO_USER]); ++ if(!ftpc->alternative_to_user) { ++ Curl_safefree(ftpc->account); ++ free(ftp); ++ return CURLE_OUT_OF_MEMORY; ++ } ++ } ++ data->req.p.ftp = ftp; ++ + ftp->path = &data->state.up.path[1]; /* don't include the initial slash */ + + /* FTP URLs support an extension like ";type=" that +@@ -4385,7 +4407,9 @@ static CURLcode ftp_setup_connection(struct Curl_easy *data, + /* get some initial data into the ftp struct */ + ftp->transfer = PPTRANSFER_BODY; + ftp->downloadsize = 0; +- conn->proto.ftpc.known_filesize = -1; /* unknown size for now */ ++ ftpc->known_filesize = -1; /* unknown size for now */ ++ ftpc->use_ssl = data->set.use_ssl; ++ ftpc->ccc = data->set.ftp_ccc; + + return CURLE_OK; + } +diff --git a/lib/ftp.h b/lib/ftp.h +index 7f6f432..3f33e27 100644 +--- a/lib/ftp.h ++++ b/lib/ftp.h +@@ -115,6 +115,8 @@ struct FTP { + struct */ + struct ftp_conn { + struct pingpong pp; ++ char *account; ++ char *alternative_to_user; + char *entrypath; /* the PWD reply when we logged on */ + char *file; /* url-decoded file name (or path) */ + char **dirs; /* realloc()ed array for path components */ +@@ -144,6 +146,9 @@ struct ftp_conn { + ftpstate state; /* always use ftp.c:state() to change state! */ + ftpstate state_saved; /* transfer type saved to be reloaded after + data connection is established */ ++ unsigned char use_ssl; /* if AUTH TLS is to be attempted etc, for FTP or ++ IMAP or POP3 or others! (type: curl_usessl)*/ ++ unsigned char ccc; /* ccc level for this connection */ + curl_off_t retr_size_saved; /* Size of retrieved file saved */ + char *server_os; /* The target server operating system. */ + curl_off_t known_filesize; /* file size is different from -1, if wildcard +diff --git a/lib/setopt.c b/lib/setopt.c +index 3339a67..6fc111d 100644 +--- a/lib/setopt.c ++++ b/lib/setopt.c +@@ -2264,7 +2264,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param) + arg = va_arg(param, long); + if((arg < CURLUSESSL_NONE) || (arg >= CURLUSESSL_LAST)) + return CURLE_BAD_FUNCTION_ARGUMENT; +- data->set.use_ssl = (curl_usessl)arg; ++ data->set.use_ssl = (unsigned char)arg; + break; + + case CURLOPT_SSL_OPTIONS: +diff --git a/lib/url.c b/lib/url.c +index 61ba832..4e21838 100644 +--- a/lib/url.c ++++ b/lib/url.c +@@ -1325,10 +1325,24 @@ ConnectionExists(struct Curl_easy *data, + } + } + +- if(get_protocol_family(needle->handler) == PROTO_FAMILY_SSH) { ++#ifdef USE_SSH ++ else if(get_protocol_family(needle->handler) == PROTO_FAMILY_SSH) { + if(!ssh_config_matches(needle, check)) + continue; + } ++#endif ++#ifndef CURL_DISABLE_FTP ++ else if(get_protocol_family(needle->handler) & PROTO_FAMILY_FTP) { ++ /* Also match ACCOUNT, ALTERNATIVE-TO-USER, USE_SSL and CCC options */ ++ if(Curl_timestrcmp(needle->proto.ftpc.account, ++ check->proto.ftpc.account) || ++ Curl_timestrcmp(needle->proto.ftpc.alternative_to_user, ++ check->proto.ftpc.alternative_to_user) || ++ (needle->proto.ftpc.use_ssl != check->proto.ftpc.use_ssl) || ++ (needle->proto.ftpc.ccc != check->proto.ftpc.ccc)) ++ continue; ++ } ++#endif + + if((needle->handler->flags&PROTOPT_SSL) + #ifndef CURL_DISABLE_PROXY +diff --git a/lib/urldata.h b/lib/urldata.h +index 9d9ca92..4e2f5b9 100644 +--- a/lib/urldata.h ++++ b/lib/urldata.h +@@ -1749,8 +1749,6 @@ struct UserDefined { + void *ssh_keyfunc_userp; /* custom pointer to callback */ + enum CURL_NETRC_OPTION + use_netrc; /* defined in include/curl.h */ +- curl_usessl use_ssl; /* if AUTH TLS is to be attempted etc, for FTP or +- IMAP or POP3 or others! */ + long new_file_perms; /* Permissions to use when creating remote files */ + long new_directory_perms; /* Permissions to use when creating remote dirs */ + long ssh_auth_types; /* allowed SSH auth types */ +@@ -1793,6 +1791,8 @@ struct UserDefined { + CURLU *uh; /* URL handle for the current parsed URL */ + void *trailer_data; /* pointer to pass to trailer data callback */ + curl_trailer_callback trailer_callback; /* trailing data callback */ ++ unsigned char use_ssl; /* if AUTH TLS is to be attempted etc, for FTP or ++ IMAP or POP3 or others! (type: curl_usessl)*/ + BIT(is_fread_set); /* has read callback been set to non-NULL? */ + BIT(is_fwrite_set); /* has write callback been set to non-NULL? */ + BIT(free_referer); /* set TRUE if 'referer' points to a string we +-- +2.39.2 + diff --git a/curl.spec b/curl.spec index 406c3cc..28e12fc 100644 --- a/curl.spec +++ b/curl.spec @@ -80,6 +80,9 @@ Patch25: 0025-curl-7.76.1-CVE-2023-27533.patch # fix SFTP path ~ resolving discrepancy (CVE-2023-27534) Patch26: 0026-curl-7.76.1-CVE-2023-27534.patch +# fix FTP too eager connection reuse (CVE-2023-27535) +Patch27: 0027-curl-7.76.1-CVE-2023-27535.patch + # patch making libcurl multilib ready Patch101: 0101-curl-7.32.0-multilib.patch @@ -280,6 +283,7 @@ be installed. %patch24 -p1 %patch25 -p1 %patch26 -p1 +%patch27 -p1 # Fedora patches %patch101 -p1 @@ -506,6 +510,7 @@ rm -f ${RPM_BUILD_ROOT}%{_libdir}/libcurl.la %changelog * Fri Mar 24 2023 Kamil Dudka - 7.76.1-24 +- fix FTP too eager connection reuse (CVE-2023-27535) - fix SFTP path ~ resolving discrepancy (CVE-2023-27534) - fix TELNET option IAC injection (CVE-2023-27533)