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ChangeLog ========== version 0.9.6 (released 2021-08-26) * CVE-2021-3634: Fix possible heap-buffer overflow when rekeying with different key exchange mechanism * Fix several memory leaks on error paths * Reset pending_call_state on disconnect * Fix handshake bug with AEAD ciphers and no HMAC overlap * Use OPENSSL_CRYPTO_LIBRARIES in CMake * Ignore request success and failure message if they are not expected * Support more identity files in configuration * Avoid setting compiler flags directly in CMake * Support build directories with special characters * Include stdlib.h to avoid crash in Windows * Fix sftp_new_channel constructs an invalid object * Fix Ninja multiple rules error * Several tests fixes version 0.9.5 (released 2020-09-10) * CVE-2020-16135: Avoid null pointer dereference in sftpserver (T232) * Improve handling of library initialization (T222) * Fix parsing of subsecond times in SFTP (T219) * Make the documentation reproducible * Remove deprecated API usage in OpenSSL * Fix regression of ssh_channel_poll_timeout() returning SSH_AGAIN * Define version in one place (T226) * Prevent invalid free when using different C runtimes than OpenSSL (T229) * Compatibility improvements to testsuite version 0.9.4 (released 2020-04-09) * Fixed CVE-2020-1730 - Possible DoS in client and server when handling AES-CTR keys with OpenSSL * Added diffie-hellman-group14-sha256 * Fixed serveral possible memory leaks version 0.9.3 (released 2019-12-10) * Fixed CVE-2019-14889 - SCP: Unsanitized location leads to command execution * SSH-01-003 Client: Missing NULL check leads to crash in erroneous state * SSH-01-006 General: Various unchecked Null-derefs cause DOS * SSH-01-007 PKI Gcrypt: Potential UAF/double free with RSA pubkeys * SSH-01-010 SSH: Deprecated hash function in fingerprinting * SSH-01-013 Conf-Parsing: Recursive wildcards in hostnames lead to DOS * SSH-01-014 Conf-Parsing: Integer underflow leads to OOB array access * SSH-01-001 State Machine: Initial machine states should be set explicitly * SSH-01-002 Kex: Differently bound macros used to iterate same array * SSH-01-005 Code-Quality: Integer sign confusion during assignments * SSH-01-008 SCP: Protocol Injection via unescaped File Names * SSH-01-009 SSH: Update documentation which RFCs are implemented * SSH-01-012 PKI: Information leak via uninitialized stack buffer version 0.9.2 (released 2019-11-07) * Fixed libssh-config.cmake * Fixed issues with rsa algorithm negotiation (T191) * Fixed detection of OpenSSL ed25519 support (T197) version 0.9.1 (released 2019-10-25) * Added support for Ed25519 via OpenSSL * Added support for X25519 via OpenSSL * Added support for localuser in Match keyword * Fixed Match keyword to be case sensitive * Fixed compilation with LibreSSL * Fixed error report of channel open (T75) * Fixed sftp documentation (T137) * Fixed known_hosts parsing (T156) * Fixed build issue with MinGW (T157) * Fixed build with gcc 9 (T164) * Fixed deprecation issues (T165) * Fixed known_hosts directory creation (T166) version 0.9.0 (released 2019-06-28) * Added support for AES-GCM * Added improved rekeying support * Added performance improvements * Disabled blowfish support by default * Fixed several ssh config parsing issues * Added support for DH Group Exchange KEX * Added support for Encrypt-then-MAC mode * Added support for parsing server side configuration file * Added support for ECDSA/Ed25519 certificates * Added FIPS 140-2 compatibility * Improved known_hosts parsing * Improved documentation * Improved OpenSSL API usage for KEX, DH, and signatures version 0.8.7 (released 2019-02-25) * Fixed handling extension flags in the server implementation * Fixed exporting ed25519 private keys * Fixed corner cases for rsa-sha2 signatures * Fixed some issues with connector version 0.8.6 (released 2018-12-24) * Fixed compilation issues with different OpenSSL versions * Fixed StrictHostKeyChecking in new knownhosts API * Fixed ssh_send_keepalive() with packet filter * Fixed possible crash with knownhosts options * Fixed issus with rekeying * Fixed strong ECDSA keys * Fixed some issues with rsa-sha2 extentions * Fixed access violation in ssh_init() (static linking) * Fixed ssh_channel_close() handling version 0.8.5 (released 2018-10-29) * Added support to get known_hosts locations with ssh_options_get() * Fixed preferred algorithm for known hosts negotiations * Fixed KEX with some server implementations (e.g. Cisco) * Fixed issues with MSVC * Fixed keyboard-interactive auth in server mode (regression from CVE-2018-10933) * Fixed gssapi auth in server mode (regression from CVE-2018-10933) * Fixed socket fd handling with proxy command * Fixed a memory leak with OpenSSL version 0.8.4 (released 2018-10-16) * Fixed CVE-2018-10933 * Fixed building without globbing support * Fixed possible memory leaks * Avoid SIGPIPE on sockets version 0.8.3 (released 2018-09-21) * Added support for rsa-sha2 * Added support to parse private keys in openssh container format (other than ed25519) * Added support for diffie-hellman-group18-sha512 and diffie-hellman-group16-sha512 * Added ssh_get_fingerprint_hash() * Added ssh_pki_export_privkey_base64() * Added support for Match keyword in config file * Improved performance and reduced memory footprint for sftp * Fixed ecdsa publickey auth * Fixed reading a closed channel * Added support to announce posix-rename@openssh.com and hardlink@openssh.com in the sftp server version 0.8.2 (released 2018-08-30) * Added sha256 fingerprints for pubkeys * Improved compiler flag detection * Fixed race condition in reading sftp messages * Fixed doxygen generation and added modern style * Fixed library initialization on Windows * Fixed __bounded__ attribute detection * Fixed a bug in the options parser * Fixed documentation for new knwon_hosts API version 0.8.1 (released 2018-08-13) * Fixed version number in the header * Fixed version number in pkg-config and cmake config * Fixed library initialization * Fixed attribute detection version 0.8.0 (released 2018-08-10) * Removed support for deprecated SSHv1 protocol * Added new connector API for clients * Added new known_hosts parsing API * Added support for OpenSSL 1.1 * Added support for chacha20-poly1305 cipher * Added crypto backend for mbedtls crypto library * Added ECDSA support with gcrypt backend * Added advanced client and server testing using cwrap.org * Added support for curve25519-sha256 alias * Added support for global known_hosts file * Added support for symbol versioning * Improved ssh_config parsing * Improved threading support version 0.7.5 (released 2017-04-13) * Fixed a memory allocation issue with buffers * Fixed PKI on Windows * Fixed some SSHv1 functions * Fixed config hostname expansion version 0.7.4 (released 2017-02-03) * Added id_ed25519 to the default identity list * Fixed sftp EOF packet handling * Fixed ssh_send_banner() to confirm with RFC 4253 * Fixed some memory leaks version 0.7.3 (released 2016-01-23) * Fixed CVE-2016-0739 * Fixed ssh-agent on big endian * Fixed some documentation issues version 0.7.2 (released 2015-09-15) * Fixed OpenSSL detection on Windows * Fixed return status for ssh_userauth_agent() * Fixed KEX to prefer hmac-sha2-256 * Fixed sftp packet handling * Fixed return values of ssh_key_is_(public|private) * Fixed bug in global success reply version 0.7.1 (released 2015-06-30) * Fixed SSH_AUTH_PARTIAL auth with auto public key * Fixed memory leak in session options * Fixed allocation of ed25519 public keys * Fixed channel exit-status and exit-signal * Reintroduce ssh_forward_listen() version 0.7.0 (released 2015-05-11) * Added support for ed25519 keys * Added SHA2 algorithms for HMAC * Added improved and more secure buffer handling code * Added callback for auth_none_function * Added support for ECDSA private key signing * Added more tests * Fixed a lot of bugs * Improved API documentation version 0.6.5 (released 2015-04-29) * Fixed CVE-2015-3146 * Fixed port handling in config file * Fixed the build with libgcrypt * Fixed SFTP endian issues (rlo #179) * Fixed uninitilized sig variable (rlo #167) * Fixed polling issues which could result in a hang * Fixed handling of EINTR in ssh_poll() (rlo #186) * Fixed C99 issues with __func__ * Fixed some memory leaks * Improved macro detection on Windows version 0.6.4 (released 2014-12-19) * Fixed CVE-2014-8132. * Added SHA-2 for session ID signing with ECDSA keys. * Added support for ECDSA host keys. * Added support for more ECDSA hostkey algorithms. * Added ssh_pki_key_ecdsa_name() API. * Fixed setting the bindfd only after successful listen. * Fixed issues with user created sockets. * Fixed several issues in libssh C++ wrapper. * Fixed several documentation issues. * Fixed channel exit-signal request. * Fixed X11 request screen number in messages. * Fixed several memory leaks. version 0.6.3 (released 2014-03-04) * Fixed CVE-2014-0017. * Fixed memory leak with ecdsa signatures. version 0.6.2 (released 2014-03-04) * security: fix for vulnerability CVE-2014-0017 version 0.6.1 (released 2014-02-08) * Added support for libgcrypt 1.6. * Added ssh_channel_accept_forward(). * Added known_hosts heuristic during connection (#138). * Added getters for session cipher names. * Fixed decrypt of zero length buffer. * Fixed padding in RSA signature blobs. * Fixed DSA signature extraction. * Fixed some memory leaks. * Fixed read of non-connected socket. * Fixed thread dectection. version 0.6.0 (released 2014-01-08) * Added new publicy key API. * Added new userauth API. * Added ssh_get_publickey_hash() function. * Added ssh_get_poll_flags() function. * Added gssapi-mic userauth. * Added GSSAPIServerIdentity option. * Added GSSAPIClientIdentity option. * Added GSSAPIDelegateCredentials option. * Added new callback based server API. * Added Elliptic Curve DSA (ECDSA) support (with OpenSSL). * Added Elliptic Curve Diffie Hellman (ECDH) support. * Added Curve25519 for ECDH key exchange. * Added improved logging system. * Added SSH-agent forwarding. * Added key-reexchange. * Added more unit tests. * Improved documentation. * Fixed timeout handling. version 0.5.5 (released 2013-07-26) * BUG 103: Fix ProxyCommand parsing. * Fix setting -D_FORTIFY_SOURCE=2. * Fix pollset error return if emtpy. * Fix NULL pointer checks in channel functions. * Several bugfixes. version 0.5.4 (released 2013-01-22) * CVE-2013-0176 - NULL dereference leads to denial of service * Fixed several NULL pointer dereferences in SSHv1. * Fixed a free crash bug in options parsing. version 0.5.3 (released 2012-11-20) * CVE-2012-4559 Fixed multiple double free() flaws. * CVE-2012-4560 Fixed multiple buffer overflow flaws. * CVE-2012-4561 Fixed multiple invalid free() flaws. * BUG #84 - Fix bug in sftp_mkdir not returning on error. * BUG #85 - Fixed a possible channel infinite loop if the connection dropped. * BUG #88 - Added missing channel request_state and set it to accepted. * BUG #89 - Reset error state to no error on successful SSHv1 authentiction. * Fixed a possible use after free in ssh_free(). * Fixed multiple possible NULL pointer dereferences. * Fixed multiple memory leaks in error paths. * Fixed timeout handling. * Fixed regression in pre-connected socket setting. * Handle all unknown global messages. version 0.5.2 (released 2011-09-17) * Increased window size x10. * Fixed SSHv1. * Fixed bugged lists. * Fixed use-after-free + inconsistent callbacks call in poll. * Fixed scp documentation. * Fixed possible infinite loop in channel_read(). * Fixed handling of short reads of sftp_async_read(). * Fixed handling request service timeout in blocking mode. * Fixed ssh_auth_list() documentation. * Fixed incorrect return values in ssh_channel_write(). * Fixed an infinite loop in the termination callback. * Fixed handling of SSH_AGAIN in channel_open(). * Fixed "status -5 inflating zlib packet" version 0.5.1 (released 2011-08-09) * Added checks for NULL pointers in string.c. * Set the channel max packet size to 32768. * Don't (de)compress empty buffers. * Fixed ssh_scp_write so it works when doing recursive copy. * Fixed another source of endless wait. * Fixed an endless loop in case of a channel_open error. * Fixed session timeout handling. * Fixed ssh_channel_from_local() loop. * Fixed permissions of scp example when we copy a file. * Workaround ssh_get_user_home_dir on LDAP users. * Added pkg-config support for libssh_threads. * Fixed compilation without server and sftp modes. * Fix static .lib overwriting on Windows. version 0.5.0 (released 2011-06-01) * Added ssh_ prefix to all functions. * Added complete Windows support. * Added improved server support. * Added unit tests for a lot of functions. * Added asynchronous service request. * Added a multiplatform ssh_getpass() function. * Added a tutorial. * Added a lot of documentation. * Fixed a lot of bugs. * Fixed several memory leaks. version 0.4.8 (released 2011-01-15) * Fixed memory leaks in session signing. * Fixed memory leak in ssh_print_hexa. * Fixed problem with ssh_connect w/ timeout and fd > 1024. * Fixed some warnings on OS/2. * Fixed installation path for OS/2. version 0.4.7 (released 2010-12-28) * Fixed a possible memory leak in ssh_get_user_home(). * Fixed a memory leak in sftp_xstat. * Fixed uninitialized fd->revents member. * Fixed timout value in ssh_channel_accept(). * Fixed length checks in ssh_analyze_banner(). * Fixed a possible data overread and crash bug. * Fixed setting max_fd which breaks ssh_select(). * Fixed some pedantic build warnings. * Fixed a memory leak with session->bindaddr. version 0.4.6 (released 2010-09-03) * Added a cleanup function to free the ws2_32 library. * Fixed build with gcc 3.4. * Fixed the Windows build on Vista and newer. * Fixed the usage of WSAPoll() on Windows. * Fixed "@deprecated" in doxygen * Fixed some mingw warnings. * Fixed handling of opened channels. * Fixed keepalive problem on older openssh servers. * Fixed testing for big endian on Windows. * Fixed the Windows preprocessor macros and defines. version 0.4.5 (released 2010-07-13) * Added option to bind a client to an ip address. * Fixed the ssh socket polling function. * Fixed Windows related bugs in bsd_poll(). * Fixed serveral build warnings. version 0.4.4 (released 2010-06-01) * Fixed a bug in the expand function for escape sequences. * Fixed a bug in the tilde expand function. * Fixed a bug in setting the options. version 0.4.3 (released 2010-05-18) * Added global/keepalive responses. * Added runtime detection of WSAPoll(). * Added a select(2) based poll-emulation if poll(2) is not available. * Added a function to expand an escaped string. * Added a function to expand the tilde from a path. * Added a proxycommand support. * Added ssh_privatekey_type public function * Added the possibility to define _OPENSSL_DIR and _ZLIB_DIR. * Fixed sftp_chown. * Fixed sftp_rename on protocol version 3. * Fixed a blocking bug in channel_poll. * Fixed config parsing wich has overwritten user specified values. * Fixed hashed [host]:port format in knownhosts * Fixed Windows build. * Fixed doublefree happening after a negociation error. * Fixed aes*-ctr with <= OpenSSL 0.9.7b. * Fixed some documentation. * Fixed exec example which has broken read usage. * Fixed broken algorithm choice for server. * Fixed a typo that we don't export all symbols. * Removed the unneeded dependency to doxygen. * Build examples only on the Linux plattform. version 0.4.2 (released 2010-03-15) * Added owner and group information in sftp attributes. * Added missing SSH_OPTIONS_FD option. * Added printout of owner and group in the sftp example. * Added a prepend function for ssh_list. * Added send back replies to openssh's keepalives. * Fixed documentation in scp code * Fixed longname parsing, this only workings with readdir. * Fixed and added support for several identity files. * Fixed sftp_parse_longname() on Windows. * Fixed a race condition bug in ssh_scp_close() * Remove config support for SSHv1 Cipher variable. * Rename ssh_list_add to ssh_list_append. * Rename ssh_list_get_head to ssh_list_pop_head version 0.4.1 (released 2010-02-13) * Added support for aes128-ctr, aes192-ctr and aes256-ctr encryption. * Added an example for exec. * Added private key type detection feature in privatekey_from_file(). * Fixed zlib compression fallback. * Fixed kex bug that client preference should be prioritary * Fixed known_hosts file set by the user. * Fixed a memleak in channel_accept(). * Fixed underflow when leave_function() are unbalanced * Fixed memory corruption in handle_channel_request_open(). * Fixed closing of a file handle case of errors in privatekey_from_file(). * Fixed ssh_get_user_home_dir() to be thread safe. * Fixed the doxygen documentation. version 0.4.0 (released 2009-12-10) * Added scp support. * Added support for sending signals (RFC 4254, section 6.9). * Added MSVC support. * Added support for ~/.ssh/config. * Added sftp extension support. * Added X11 forwarding support for client. * Added forward listening. * Added support for openssh extensions (statvfs, fstatvfs). * Added a cleaned up interface for setting options. * Added a generic way to handle sockets asynchronously. * Added logging of the sftp flags used to open a file. * Added full poll() support and poll-emulation for win32. * Added missing 64bit functions in sftp. * Added support for ~/ and SSH_DIR/ in filenames instead of %s/. * Fixed Fix channel_get_exit_status bug. * Fixed calltrace logging to make it optional. * Fixed compilation on Solaris. * Fixed resolving of ip addresses. * Fixed libssh compilation without server support. * Fixed possible memory corruptions (ticket #14). version 0.3.4 (released 2009-09-14) * Added ssh_basename and ssh_dirname. * Added a portable ssh_mkdir function. * Added a sftp_tell64() function. * Added missing NULL pointer checks to crypt_set_algorithms_server. * Fixed ssh_write_knownhost if ~/.ssh doesn't exist. * Fixed a possible integer overflow in buffer_get_data(). * Fixed possible security bug in packet_decrypt(). * Fixed a possible stack overflow in agent code. version 0.3.3 (released 2009-08-18) * Fixed double free pointer crash in dsa_public_to_string. * Fixed channel_get_exit_status bug. * Fixed ssh_finalize which didn't clear the flag. * Fixed memory leak introduced by previous bugfix. * Fixed channel_poll broken when delayed EOF recvd. * Fixed stupid "can't parse known host key" bug. * Fixed possible memory corruption (ticket #14). version 0.3.2 (released 2009-08-05) * Added ssh_init() function. * Added sftp_readlink() function. * Added sftp_symlink() function. * Fixed ssh_write_knownhost(). * Fixed compilation on Solaris. * Fixed SSHv1 compilation. version 0.3.1 (released 2009-07-14) * Added return code SSH_SERVER_FILE_NOT_FOUND. * Fixed compilation of SSHv1. * Fixed several memory leaks. * Fixed possible infinite loops. * Fixed a possible crash bug. * Fixed build warnings. * Fixed cmake on BSD. version 0.3.1 (released 2009-07-14) * Added return code SSH_SERVER_FILE_NOT_FOUND. * Fixed compilation of SSHv1. * Fixed several memory leaks. * Fixed possible infinite loops. * Fixed a possible crash bug. * Fixed build warnings. * Fixed cmake on BSD. version 0.3 (released 2009-05-21) * Added support for ssh-agent authentication. * Added POSIX like sftp implementation. * Added error checking to all functions. * Added const to arguments where it was needed. * Added a channel_get_exit_status() function. * Added a channel_read_buffer() function, channel_read() is now a POSIX like function. * Added a more generic auth callback function. * Added printf attribute checking for log and error functions. * Added runtime function tracer support. * Added NSIS build support with CPack. * Added openssh hashed host support. * Added API documentation for all public functions. * Added asynchronous SFTP read function. * Added a ssh_bind_set_fd() function. * Fixed known_hosts parsing. * Fixed a lot of build warnings. * Fixed the Windows build. * Fixed a lot of memory leaks. * Fixed a double free corruption in the server support. * Fixed the "ssh_accept:" bug in server support. * Fixed important channel bugs. * Refactored the socket handling. * Switched to CMake build system. * Improved performance. version 0.2 (released 2007-11-29) * General cleanup * More comprehensive API * Up-to-date Doxygen documentation of each public function * Basic server-based support * Libgcrypt support (alternative to openssl and its license) * SSH1 support (disabled by default) * Added 3des-cbc * A lot of bugfixes version 0.11-dev * Server implementation development. * Small bug corrected when connecting to sun ssh servers. * Channel wierdness corrected (writing huge data packets) * Channel_read_nonblocking added * Channel bug where stderr wasn't correctly read fixed. * Added sftp_file_set_nonblocking(), which is nonblocking SFTP IO * Connect_status callback. * Priv.h contains the internal functions, libssh.h the public interface * Options_set_timeout (thx marcelo) really working. * Tcp tunneling through channel_open_forward. * Channel_request_exec() * Channel_request_env() * Ssh_get_pubkey_hash() * Ssh_is_server_known() * Ssh_write_known_host() * Options_set_ssh_dir * How could this happen ! there weren't any channel_close ! * Nasty channel_free bug resolved. * Removed the unsigned long all around the code. use only u8,u32 & u64. * It now compiles and runs under amd64 ! * Channel_request_pty_size * Channel_change_pty_size * Options_copy() * Ported the doc to an HTML file. * Small bugfix in packet.c * Prefixed error constants with SSH_ * Sftp_stat, sftp_lstat, sftp_fstat. thanks Michel Bardiaux for the patch. * Again channel number mismatch fixed. * Fixed a bug in ssh_select making the select fail when a signal has been caught. * Keyboard-interactive authentication working. version 0.1 (released 2004-03-05) * Begining of sftp subsystem implementation. * Some cleanup into channels implementation * Now every channel functions is called by its CHANNEL handler. * Added channel_poll() and channel_read(). * Changed the client so it uses the new channel_poll and channel_read interface * Small use-after-free bug with channels resolved * Changed stupidities in lot of function names. * Removed a debug output file opened by default. * Added API.txt, the libssh programmer handbook. * Various bug fixes from Nick Zitzmann. * Developed a cryptographic structure for handling protocols. * An autoconf script which took me half of a day to set up. * A ssh_select wrapper has been written. version 0.0.4 (released 2003-10-10) * Some terminal code (eof handling) added * Channels bugfix (it still needs some tweaking though) * Zlib support * Added a wrapper.c file. The goal is to provide a similar API to every cryptographic functions. bignums and sha/md5 are wrapped now. * More work than it first looks. * Support for other crypto libs planed (lighter libs) * Fixed stupid select() bug. * Libssh now compiles and links with openssl 0.9.6 * RSA pubkey authentication code now works ! version 0.0.3 (released 2003-09-15) * Added install target in makefile * Some cleanup in headers files and source code * Change default banner and project name to libssh. * New file auth.c to support more and more authentication ways * Bugfix(read offbyone) in send_kex * A base64 parser. don't read the source, it's awful. pure 0xbadc0de. * Changed the client filename to "ssh". logic isn't it ? * Dss publickey authentication ! still need to wait for the rsa one * Bugfix in packet.c * New misc.c contains misc functions version 0.0.2 (released 2003-09-03) * Initial release. * Client supports both ssh and dss hostkey verification, but doesn't compare them to openssh's files. (~/.ssh/known_hosts) * The only supported authentication method is password. * Compiles on linux and openbsd. freebsd and netbsd should work, too * Lot of work which hasn't been discussed here.
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