Bug 532692 – net-misc/openssh-6.7_p1 connecting to older openssh server - Received disconnect from XXX.XXX.XXX.XXX: 2: Corrupted MAC on input.

• Status: UNCONFIRMED
• Product: Gentoo Linux

[Description Nizar Abed 2014-12-16 11:26:15 UTC]

emerge --info(system with newer openssh)
Portage 2.2.14 (python 2.7.7-final-0, default/linux/amd64/13.0, gcc-4.8.3, glibc-2.19-r1, 3.10.7-gentoo-r1 x86_64)
=================================================================
System uname: Linux-3.10.7-gentoo-r1-x86_64-Intel-R-_Xeon-R-_CPU_X5675_@_3.07GHz-with-gentoo-2.2
KiB Mem:    49450292 total,  16085844 free
KiB Swap:    8388540 total,   8388540 free
Timestamp of tree: Mon, 15 Dec 2014 02:30:02 +0000
ld GNU ld (Gentoo 2.24 p1.4) 2.24
app-shells/bash:          4.2_p53
dev-java/java-config:     2.2.0
dev-lang/perl:            5.18.2-r2
dev-lang/python:          2.7.7, 3.2.5-r6, 3.3.5-r1, 3.4.1
dev-util/cmake:           2.8.12.2-r1
dev-util/pkgconfig:       0.28-r1
sys-apps/baselayout:      2.2
sys-apps/openrc:          0.12.4
sys-apps/sandbox:         2.6-r1
sys-devel/autoconf:       2.69
sys-devel/automake:       1.11.6, 1.13.4
sys-devel/binutils:       2.24-r3
sys-devel/gcc:            4.7.3-r1, 4.8.3
sys-devel/gcc-config:     1.7.3
sys-devel/libtool:        2.4.2-r1
sys-devel/make:           4.0-r1
sys-kernel/linux-headers: 3.16 (virtual/os-headers)
sys-libs/glibc:           2.19-r1
Repositories: gentoo
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O3 -pipe -march=nocona -fomit-frame-pointer"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt /var/bind /var/yp/Makefile"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.5/ext-active/ /etc/php/cgi-php5.5/ext-active/ /etc/php/cli-php5.5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O3 -pipe -march=nocona -fomit-frame-pointer"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs buildpkg config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://larrythecow.ls.huji.ac.il/gentoo_mirror"
LANG="en_US.utf8"
LC_ALL="POSIX"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j8"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://larrythecow.ls.huji.ac.il/gentoo-portage"
USE="acl amd64 apache2 berkdb bzip2 cli cracklib crypt cxx dri fortran gdbm iconv ipv6 mmx modules mpi multilib ncurses nls nptl nptlonly openmp pam pcre png python readline romio session sse sse2 ssl tcpd unicode vim-syntax xml zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias auth_digest cgi cgid" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3" RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="vesa vga" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON


emerge --info(system with older openssh: net-misc/openssh-5.1_p1-r1)
Portage 2.1.6.4 (default/linux/amd64/13.0, gcc-4.1.2, glibc-2.6.1-r0, 2.6.24-gentoo-r8 x86_64)
=================================================================
System uname: Linux-2.6.24-gentoo-r8-x86_64-Dual_Core_AMD_Opteron-tm-_Processor_290-with-glibc2.2.5
Timestamp of tree: Mon, 15 Dec 2014 02:30:02 +0000
app-shells/bash:     3.2_p39
dev-lang/perl:       5.8.8-r5
dev-lang/python:     2.4.4-r13, 2.5.2-r7
dev-util/pkgconfig:  0.23
sys-apps/baselayout: 1.12.11.1
sys-apps/sandbox:    1.2.18.1-r2
sys-devel/autoconf:  2.63
sys-devel/automake:  1.10.2
sys-devel/binutils:  2.18-r3
sys-devel/gcc:       4.1.2
sys-devel/gcc-config: 1.4.0-r4
sys-devel/libtool:   1.5.26
sys-devel/make:      3.81
sys-kernel/linux-headers: 2.6.27-r2
sys-libs/glibc:      2.6.1
virtual/os-headers:  2.6.27-r2
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O3 -pipe -march=opteron"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/revdep-rebuild /etc/terminfo /etc/udev/rules.d"
CXXFLAGS="-O3 -pipe -march=opteron"
DISTDIR="/usr/portage/distfiles"
FEATURES="buildpkg distlocks fixpackages parallel-fetch protect-owned sandbox sfperms strict unmerge-orphans userfetch"
GENTOO_MIRRORS="http://larrythecow.ls.huji.ac.il/gentoo_mirror"
LDFLAGS=""
MAKEOPTS="-j5"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://larrythecow.ls.huji.ac.il/gentoo-portage"
USE="mmx nptl nptlonly sse sse2"
Unset:  ACCEPT_KEYWORDS, CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FCFLAGS, FFLAGS, INSTALL_MASK, LANG, LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY, USE_PYTHON

[Comment 1 Jeroen Roovers (RETIRED) 2014-12-16 21:51:13 UTC]

Can you provide a little more information about what is happening?

[Comment 2 Nizar Abed 2014-12-17 08:15:34 UTC]

(In reply to Jeroen Roovers from comment #1)
> Can you provide a little more information about what is happening?

Here is ssh -v -v to host:
OpenSSH_6.7p1-hpn14v5, OpenSSL 1.0.1j 15 Oct 2014
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to thumper [XXX.XXX.XXX.XXX] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: identity file /root/.ssh/id_dsa type 2
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.7p1-hpn14v5
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1
debug1: Remote is NON-HPN aware
debug1: match: OpenSSH_5.1 pat OpenSSH_5* compat 0x2c000000
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: AUTH STATE IS 0
debug2: kex_parse_kexinit: [e-mail],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: [e-mail],[e-mail],ssh-rsa,[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,[e-mail],[e-mail],[e-mail],arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[e-mail]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,[e-mail],[e-mail],[e-mail],arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[e-mail]
debug2: kex_parse_kexinit: [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],hmac-sha2-256,hmac-sha2-512,hmac-sha1,[e-mail],[e-mail],[e-mail],[e-mail],hmac-md5,hmac-ripemd160,[e-mail],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],hmac-sha2-256,hmac-sha2-512,hmac-sha1,[e-mail],[e-mail],[e-mail],[e-mail],hmac-md5,hmac-ripemd160,[e-mail],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[e-mail],zlib
debug2: kex_parse_kexinit: none,[e-mail],zlib
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,[e-mail],aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,[e-mail],aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[e-mail],hmac-ripemd160,[e-mail],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[e-mail],hmac-ripemd160,[e-mail],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[e-mail]
debug2: kex_parse_kexinit: none,[e-mail]
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: mac_setup: setup [e-mail]
debug1: REQUESTED ENC.NAME is 'aes128-ctr'
debug1: kex: server->client aes128-ctr [e-mail] none
debug2: mac_setup: setup [e-mail]
debug1: REQUESTED ENC.NAME is 'aes128-ctr'
debug1: kex: client->server aes128-ctr [e-mail] none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<3072<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug2: bits set: 1569/3072
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA c2:14:ba:78:e0:13:f2:7d:cf:3c:e6:b5:4c:76:a0:88
debug1: Host 'thumper' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:60
debug2: bits set: 1563/3072
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /root/.ssh/id_rsa ((nil)),
debug2: key: /root/.ssh/id_dsa (0x7f5facde0b10),
debug2: key: /root/.ssh/id_ecdsa ((nil)),
debug2: key: /root/.ssh/id_ed25519 ((nil)),
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/id_rsa
debug1: Offering DSA public key: /root/.ssh/id_dsa
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Trying private key: /root/.ssh/id_ecdsa
debug1: Trying private key: /root/.ssh/id_ed25519
debug2: we did not send a packet, disable method
debug1: Next authentication method: keyboard-interactive
debug2: userauth_kbdint
debug2: we sent a keyboard-interactive packet, wait for reply
debug2: input_userauth_info_req
debug2: input_userauth_info_req: num_prompts 1
Password: 
debug2: input_userauth_info_req
debug2: input_userauth_info_req: num_prompts 0
debug1: Single to Multithread CTR cipher swap - client request
debug1: Authentication succeeded (keyboard-interactive).
Authenticated to thumper ([XXX.XXX.XXX.XXX]:22).
debug1: HPN to Non-HPN Connection
debug1: Final hpn_buffer_size = 2097152
debug1: HPN Disabled: 0, HPN Buffer Size: 2097152
debug1: channel 0: new [client-session]
debug1: Enabled Dynamic Window Scaling
debug2: channel 0: send open
debug1: Requesting [e-mail]
debug1: Entering interactive session.
debug1: need rekeying
debug1: SSH2_MSG_KEXINIT sent
debug1: rekeying in progress
debug2: callback start
debug2: fd 3 setting TCP_NODELAY/SCTP_NODELAY
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug1: enqueue packet: 98
debug1: Sending environment.
debug1: Sending env LANG = en_US.utf8
debug2: channel 0: request env confirm 0
debug1: enqueue packet: 98
debug2: channel 0: request shell confirm 1
debug1: enqueue packet: 98
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
Received disconnect from XXX.XXX.XXX.XXX: 2: Corrupted MAC on input.

Please let me know if more info needed.

[Comment 3 SpanKY 2015-03-17 03:31:21 UTC]

can you try building openssh with USE=-hpn and see if it helps ?

[Comment 4 Christoph Löhr 2015-04-03 10:43:48 UTC]

Hi, does not help

[Comment 5 mike johnson 2017-03-27 19:48:36 UTC]

I've got the same problem. I've been using version 5.8 and everything worked beautifully. Updated to version 7.3 and now can't connect to server running version 4.7_p1-r6. Can connect to that server using version 5.9_p1-r4. So it seems something has broken between 5.9 and 7.3. Also, no problem connecting to a separate server running version 4.5 using version 7.3. Successful connections are "HPN to Non-HPN Connection" as well so not convinced that will help but willing to try. Could there be a problem with HPN Buffer Size on older server hardware? Thanks for any help.
...
debug1: Authentication succeeded (publickey).
Authenticated to xxx.xxx.xx.xx ([xxx.xxx.xx.xx]:22).
debug1: HPN to Non-HPN Connection
debug1: Final hpn_buffer_size = 2097152
debug1: HPN Disabled: 0, HPN Buffer Size: 2097152
debug2: fd 6 setting O_NONBLOCK
debug1: channel 0: new [client-session]
debug1: Enabled Dynamic Window Scaling
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: ssh_packet_send2: rekex triggered
debug1: enqueue packet: 90
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug1: Entering interactive session.
debug1: pledge: network
debug1: rekeying in progress
debug1: rekeying in progress
debug3: receive packet: type 1
Received disconnect from xxx.xxx.xx.xx port 22:2: Corrupted MAC on input.
Disconnected from xxx.xxx.xx.xx port 22