phpseclib
Undefined offset: 1
Hey there. I'm getting this error from one of the linux machine only. Happens on this line: https://github.com/phpseclib/phpseclib/blob/3.0/phpseclib/Net/SSH2.php#L4328
Undefined offset: 1
#0 /var/www/foobar/vendor/phpseclib/phpseclib/phpseclib/Net/SSH2.php(4328): yii\base\ErrorHandler->handleError()
#1 /var/www/foobar/vendor/phpseclib/phpseclib/phpseclib/Net/SSH2.php(3831): phpseclib3\Net\SSH2->close_channel()
#2 /var/www/foobar/vendor/phpseclib/phpseclib/phpseclib/Net/SSH2.php(2747): phpseclib3\Net\SSH2->get_channel_packet()
#3 /var/www/foobar/common/components/SSH2.php(71): phpseclib3\Net\SSH2->exec()
Any help would be highly appreciated.
Can you get me the SSH logs? You can get them by doing define('NET_SSH2_LOGGING', 2) at the top of your file and then echo $ssh->getLog() after you encounter the error.
Thanks!
Attaching SSH log right after Undefined offset: 1 error
<-
00000000 53:53:48:2d:32:2e:30:2d:4f:70:65:6e:53:53:48:5f SSH-2.0-OpenSSH_
00000010 38:2e:39:70:31:20:55:62:75:6e:74:75:2d:33:0d:0a 8.9p1 Ubuntu-3..
->
00000000 53:53:48:2d:32:2e:30:2d:70:68:70:73:65:63:6c:69 SSH-2.0-phpsecli
00000010 62:5f:33:2e:30:20:28:6c:69:62:73:6f:64:69:75:6d b_3.0 (libsodium
00000020 2c:20:6f:70:65:6e:73:73:6c:2c:20:67:6d:70:29:0d , openssl, gmp).
00000030 0a .
-> NET_SSH2_MSG_KEXINIT (since last: 0.2372, network: 0s)
00000000 f6:f4:ec:7e:23:5e:d1:23:48:bc:95:63:05:48:b5:42 ...~#^.#H..c.H.B
00000010 00:00:01:7c:63:75:72:76:65:32:35:35:31:39:2d:73 ...|curve25519-s
00000020 68:61:32:35:36:2c:63:75:72:76:65:32:35:35:31:39 ha256,curve25519
00000030 2d:73:68:61:32:35:36:40:6c:69:62:73:73:68:2e:6f [email protected]
00000040 72:67:2c:65:63:64:68:2d:73:68:61:32:2d:6e:69:73 rg,ecdh-sha2-nis
00000050 74:70:32:35:36:2c:65:63:64:68:2d:73:68:61:32:2d tp256,ecdh-sha2-
00000060 6e:69:73:74:70:33:38:34:2c:65:63:64:68:2d:73:68 nistp384,ecdh-sh
00000070 61:32:2d:6e:69:73:74:70:35:32:31:2c:64:69:66:66 a2-nistp521,diff
00000080 69:65:2d:68:65:6c:6c:6d:61:6e:2d:67:72:6f:75:70 ie-hellman-group
00000090 2d:65:78:63:68:61:6e:67:65:2d:73:68:61:32:35:36 -exchange-sha256
000000a0 2c:64:69:66:66:69:65:2d:68:65:6c:6c:6d:61:6e:2d ,diffie-hellman-
000000b0 67:72:6f:75:70:2d:65:78:63:68:61:6e:67:65:2d:73 group-exchange-s
000000c0 68:61:31:2c:64:69:66:66:69:65:2d:68:65:6c:6c:6d ha1,diffie-hellm
000000d0 61:6e:2d:67:72:6f:75:70:31:34:2d:73:68:61:32:35 an-group14-sha25
000000e0 36:2c:64:69:66:66:69:65:2d:68:65:6c:6c:6d:61:6e 6,diffie-hellman
000000f0 2d:67:72:6f:75:70:31:34:2d:73:68:61:31:2c:64:69 -group14-sha1,di
00000100 66:66:69:65:2d:68:65:6c:6c:6d:61:6e:2d:67:72:6f ffie-hellman-gro
00000110 75:70:31:35:2d:73:68:61:35:31:32:2c:64:69:66:66 up15-sha512,diff
00000120 69:65:2d:68:65:6c:6c:6d:61:6e:2d:67:72:6f:75:70 ie-hellman-group
00000130 31:36:2d:73:68:61:35:31:32:2c:64:69:66:66:69:65 16-sha512,diffie
00000140 2d:68:65:6c:6c:6d:61:6e:2d:67:72:6f:75:70:31:37 -hellman-group17
00000150 2d:73:68:61:35:31:32:2c:64:69:66:66:69:65:2d:68 -sha512,diffie-h
00000160 65:6c:6c:6d:61:6e:2d:67:72:6f:75:70:31:38:2d:73 ellman-group18-s
00000170 68:61:35:31:32:2c:64:69:66:66:69:65:2d:68:65:6c ha512,diffie-hel
00000180 6c:6d:61:6e:2d:67:72:6f:75:70:31:2d:73:68:61:31 lman-group1-sha1
00000190 00:00:00:71:73:73:68:2d:65:64:32:35:35:31:39:2c ...qssh-ed25519,
000001a0 65:63:64:73:61:2d:73:68:61:32:2d:6e:69:73:74:70 ecdsa-sha2-nistp
000001b0 32:35:36:2c:65:63:64:73:61:2d:73:68:61:32:2d:6e 256,ecdsa-sha2-n
000001c0 69:73:74:70:33:38:34:2c:65:63:64:73:61:2d:73:68 istp384,ecdsa-sh
000001d0 61:32:2d:6e:69:73:74:70:35:32:31:2c:72:73:61:2d a2-nistp521,rsa-
000001e0 73:68:61:32:2d:32:35:36:2c:72:73:61:2d:73:68:61 sha2-256,rsa-sha
000001f0 32:2d:35:31:32:2c:73:73:68:2d:72:73:61:2c:73:73 2-512,ssh-rsa,ss
00000200 68:2d:64:73:73:00:00:01:01:61:65:73:32:35:36:2d h-dss....aes256-
00000210 67:63:6d:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c [email protected],
00000220 61:65:73:31:32:38:2d:67:63:6d:40:6f:70:65:6e:73 aes128-gcm@opens
00000230 73:68:2e:63:6f:6d:2c:61:65:73:31:32:38:2d:63:74 sh.com,aes128-ct
00000240 72:2c:61:65:73:31:39:32:2d:63:74:72:2c:61:65:73 r,aes192-ctr,aes
00000250 32:35:36:2d:63:74:72:2c:61:65:73:31:32:38:2d:63 256-ctr,aes128-c
00000260 62:63:2c:61:65:73:31:39:32:2d:63:62:63:2c:61:65 bc,aes192-cbc,ae
00000270 73:32:35:36:2d:63:62:63:2c:62:6c:6f:77:66:69:73 s256-cbc,blowfis
00000280 68:2d:63:74:72:2c:62:6c:6f:77:66:69:73:68:2d:63 h-ctr,blowfish-c
00000290 62:63:2c:33:64:65:73:2d:63:74:72:2c:33:64:65:73 bc,3des-ctr,3des
000002a0 2d:63:62:63:2c:74:77:6f:66:69:73:68:31:32:38:2d -cbc,twofish128-
000002b0 63:74:72:2c:74:77:6f:66:69:73:68:31:39:32:2d:63 ctr,twofish192-c
000002c0 74:72:2c:74:77:6f:66:69:73:68:32:35:36:2d:63:74 tr,twofish256-ct
000002d0 72:2c:74:77:6f:66:69:73:68:31:32:38:2d:63:62:63 r,twofish128-cbc
000002e0 2c:74:77:6f:66:69:73:68:31:39:32:2d:63:62:63:2c ,twofish192-cbc,
000002f0 74:77:6f:66:69:73:68:32:35:36:2d:63:62:63:2c:74 twofish256-cbc,t
00000300 77:6f:66:69:73:68:2d:63:62:63:00:00:01:01:61:65 wofish-cbc....ae
00000310 73:32:35:36:2d:67:63:6d:40:6f:70:65:6e:73:73:68 s256-gcm@openssh
00000320 2e:63:6f:6d:2c:61:65:73:31:32:38:2d:67:63:6d:40 .com,aes128-gcm@
00000330 6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:61:65:73:31 openssh.com,aes1
00000340 32:38:2d:63:74:72:2c:61:65:73:31:39:32:2d:63:74 28-ctr,aes192-ct
00000350 72:2c:61:65:73:32:35:36:2d:63:74:72:2c:61:65:73 r,aes256-ctr,aes
00000360 31:32:38:2d:63:62:63:2c:61:65:73:31:39:32:2d:63 128-cbc,aes192-c
00000370 62:63:2c:61:65:73:32:35:36:2d:63:62:63:2c:62:6c bc,aes256-cbc,bl
00000380 6f:77:66:69:73:68:2d:63:74:72:2c:62:6c:6f:77:66 owfish-ctr,blowf
00000390 69:73:68:2d:63:62:63:2c:33:64:65:73:2d:63:74:72 ish-cbc,3des-ctr
000003a0 2c:33:64:65:73:2d:63:62:63:2c:74:77:6f:66:69:73 ,3des-cbc,twofis
000003b0 68:31:32:38:2d:63:74:72:2c:74:77:6f:66:69:73:68 h128-ctr,twofish
000003c0 31:39:32:2d:63:74:72:2c:74:77:6f:66:69:73:68:32 192-ctr,twofish2
000003d0 35:36:2d:63:74:72:2c:74:77:6f:66:69:73:68:31:32 56-ctr,twofish12
000003e0 38:2d:63:62:63:2c:74:77:6f:66:69:73:68:31:39:32 8-cbc,twofish192
000003f0 2d:63:62:63:2c:74:77:6f:66:69:73:68:32:35:36:2d -cbc,twofish256-
00000400 63:62:63:2c:74:77:6f:66:69:73:68:2d:63:62:63:00 cbc,twofish-cbc.
00000410 00:00:f7:68:6d:61:63:2d:73:68:61:32:2d:32:35:36 ...hmac-sha2-256
00000420 2d:65:74:6d:40:6f:70:65:6e:73:73:68:2e:63:6f:6d [email protected]
00000430 2c:68:6d:61:63:2d:73:68:61:32:2d:35:31:32:2d:65 ,hmac-sha2-512-e
00000440 74:6d:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:75 [email protected],u
00000450 6d:61:63:2d:36:34:2d:65:74:6d:40:6f:70:65:6e:73 mac-64-etm@opens
00000460 73:68:2e:63:6f:6d:2c:75:6d:61:63:2d:31:32:38:2d sh.com,umac-128-
00000470 65:74:6d:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c [email protected],
00000480 68:6d:61:63:2d:73:68:61:31:2d:65:74:6d:40:6f:70 hmac-sha1-etm@op
00000490 65:6e:73:73:68:2e:63:6f:6d:2c:68:6d:61:63:2d:73 enssh.com,hmac-s
000004a0 68:61:32:2d:32:35:36:2c:68:6d:61:63:2d:73:68:61 ha2-256,hmac-sha
000004b0 32:2d:35:31:32:2c:75:6d:61:63:2d:36:34:40:6f:70 2-512,umac-64@op
000004c0 65:6e:73:73:68:2e:63:6f:6d:2c:75:6d:61:63:2d:31 enssh.com,umac-1
000004d0 32:38:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:68 [email protected],h
000004e0 6d:61:63:2d:73:68:61:31:2d:39:36:2c:68:6d:61:63 mac-sha1-96,hmac
000004f0 2d:73:68:61:31:2c:68:6d:61:63:2d:6d:64:35:2d:39 -sha1,hmac-md5-9
00000500 36:2c:68:6d:61:63:2d:6d:64:35:00:00:00:f7:68:6d 6,hmac-md5....hm
00000510 61:63:2d:73:68:61:32:2d:32:35:36:2d:65:74:6d:40 ac-sha2-256-etm@
00000520 6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:68:6d:61:63 openssh.com,hmac
00000530 2d:73:68:61:32:2d:35:31:32:2d:65:74:6d:40:6f:70 -sha2-512-etm@op
00000540 65:6e:73:73:68:2e:63:6f:6d:2c:75:6d:61:63:2d:36 enssh.com,umac-6
00000550 34:2d:65:74:6d:40:6f:70:65:6e:73:73:68:2e:63:6f [email protected]
00000560 6d:2c:75:6d:61:63:2d:31:32:38:2d:65:74:6d:40:6f m,umac-128-etm@o
00000570 70:65:6e:73:73:68:2e:63:6f:6d:2c:68:6d:61:63:2d penssh.com,hmac-
00000580 73:68:61:31:2d:65:74:6d:40:6f:70:65:6e:73:73:68 sha1-etm@openssh
00000590 2e:63:6f:6d:2c:68:6d:61:63:2d:73:68:61:32:2d:32 .com,hmac-sha2-2
000005a0 35:36:2c:68:6d:61:63:2d:73:68:61:32:2d:35:31:32 56,hmac-sha2-512
000005b0 2c:75:6d:61:63:2d:36:34:40:6f:70:65:6e:73:73:68 ,umac-64@openssh
000005c0 2e:63:6f:6d:2c:75:6d:61:63:2d:31:32:38:40:6f:70 .com,umac-128@op
000005d0 65:6e:73:73:68:2e:63:6f:6d:2c:68:6d:61:63:2d:73 enssh.com,hmac-s
000005e0 68:61:31:2d:39:36:2c:68:6d:61:63:2d:73:68:61:31 ha1-96,hmac-sha1
000005f0 2c:68:6d:61:63:2d:6d:64:35:2d:39:36:2c:68:6d:61 ,hmac-md5-96,hma
00000600 63:2d:6d:64:35:00:00:00:1a:6e:6f:6e:65:2c:7a:6c c-md5....none,zl
00000610 69:62:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:7a [email protected],z
00000620 6c:69:62:00:00:00:1a:6e:6f:6e:65:2c:7a:6c:69:62 lib....none,zlib
00000630 40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:7a:6c:69 @openssh.com,zli
00000640 62:00:00:00:00:00:00:00:00:00:00:00:00:00 b.............
<- NET_SSH2_MSG_KEXINIT (since last: 0.1124, network: 0.1124s)
00000000 c9:f4:35:8d:f5:1d:9b:2b:0f:bb:5a:70:1a:08:6f:06 ..5....+..Zp..o.
00000010 00:00:01:09:63:75:72:76:65:32:35:35:31:39:2d:73 ....curve25519-s
00000020 68:61:32:35:36:2c:63:75:72:76:65:32:35:35:31:39 ha256,curve25519
00000030 2d:73:68:61:32:35:36:40:6c:69:62:73:73:68:2e:6f [email protected]
00000040 72:67:2c:65:63:64:68:2d:73:68:61:32:2d:6e:69:73 rg,ecdh-sha2-nis
00000050 74:70:32:35:36:2c:65:63:64:68:2d:73:68:61:32:2d tp256,ecdh-sha2-
00000060 6e:69:73:74:70:33:38:34:2c:65:63:64:68:2d:73:68 nistp384,ecdh-sh
00000070 61:32:2d:6e:69:73:74:70:35:32:31:2c:73:6e:74:72 a2-nistp521,sntr
00000080 75:70:37:36:31:78:32:35:35:31:39:2d:73:68:61:35 up761x25519-sha5
00000090 31:32:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:64 [email protected],d
000000a0 69:66:66:69:65:2d:68:65:6c:6c:6d:61:6e:2d:67:72 iffie-hellman-gr
000000b0 6f:75:70:2d:65:78:63:68:61:6e:67:65:2d:73:68:61 oup-exchange-sha
000000c0 32:35:36:2c:64:69:66:66:69:65:2d:68:65:6c:6c:6d 256,diffie-hellm
000000d0 61:6e:2d:67:72:6f:75:70:31:36:2d:73:68:61:35:31 an-group16-sha51
000000e0 32:2c:64:69:66:66:69:65:2d:68:65:6c:6c:6d:61:6e 2,diffie-hellman
000000f0 2d:67:72:6f:75:70:31:38:2d:73:68:61:35:31:32:2c -group18-sha512,
00000100 64:69:66:66:69:65:2d:68:65:6c:6c:6d:61:6e:2d:67 diffie-hellman-g
00000110 72:6f:75:70:31:34:2d:73:68:61:32:35:36:00:00:00 roup14-sha256...
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00000130 61:2d:73:68:61:32:2d:32:35:36:2c:65:63:64:73:61 a-sha2-256,ecdsa
00000140 2d:73:68:61:32:2d:6e:69:73:74:70:32:35:36:2c:73 -sha2-nistp256,s
00000150 73:68:2d:65:64:32:35:35:31:39:00:00:00:6c:63:68 sh-ed25519...lch
00000160 61:63:68:61:32:30:2d:70:6f:6c:79:31:33:30:35:40 acha20-poly1305@
00000170 6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:61:65:73:31 openssh.com,aes1
00000180 32:38:2d:63:74:72:2c:61:65:73:31:39:32:2d:63:74 28-ctr,aes192-ct
00000190 72:2c:61:65:73:32:35:36:2d:63:74:72:2c:61:65:73 r,aes256-ctr,aes
000001a0 31:32:38:2d:67:63:6d:40:6f:70:65:6e:73:73:68:2e 128-gcm@openssh.
000001b0 63:6f:6d:2c:61:65:73:32:35:36:2d:67:63:6d:40:6f com,aes256-gcm@o
000001c0 70:65:6e:73:73:68:2e:63:6f:6d:00:00:00:6c:63:68 penssh.com...lch
000001d0 61:63:68:61:32:30:2d:70:6f:6c:79:31:33:30:35:40 acha20-poly1305@
000001e0 6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:61:65:73:31 openssh.com,aes1
000001f0 32:38:2d:63:74:72:2c:61:65:73:31:39:32:2d:63:74 28-ctr,aes192-ct
00000200 72:2c:61:65:73:32:35:36:2d:63:74:72:2c:61:65:73 r,aes256-ctr,aes
00000210 31:32:38:2d:67:63:6d:40:6f:70:65:6e:73:73:68:2e 128-gcm@openssh.
00000220 63:6f:6d:2c:61:65:73:32:35:36:2d:67:63:6d:40:6f com,aes256-gcm@o
00000230 70:65:6e:73:73:68:2e:63:6f:6d:00:00:00:d5:75:6d penssh.com....um
00000240 61:63:2d:36:34:2d:65:74:6d:40:6f:70:65:6e:73:73 ac-64-etm@openss
00000250 68:2e:63:6f:6d:2c:75:6d:61:63:2d:31:32:38:2d:65 h.com,umac-128-e
00000260 74:6d:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:68 [email protected],h
00000270 6d:61:63:2d:73:68:61:32:2d:32:35:36:2d:65:74:6d mac-sha2-256-etm
00000280 40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:68:6d:61 @openssh.com,hma
00000290 63:2d:73:68:61:32:2d:35:31:32:2d:65:74:6d:40:6f c-sha2-512-etm@o
000002a0 70:65:6e:73:73:68:2e:63:6f:6d:2c:68:6d:61:63:2d penssh.com,hmac-
000002b0 73:68:61:31:2d:65:74:6d:40:6f:70:65:6e:73:73:68 sha1-etm@openssh
000002c0 2e:63:6f:6d:2c:75:6d:61:63:2d:36:34:40:6f:70:65 .com,umac-64@ope
000002d0 6e:73:73:68:2e:63:6f:6d:2c:75:6d:61:63:2d:31:32 nssh.com,umac-12
000002e0 38:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:68:6d [email protected],hm
000002f0 61:63:2d:73:68:61:32:2d:32:35:36:2c:68:6d:61:63 ac-sha2-256,hmac
00000300 2d:73:68:61:32:2d:35:31:32:2c:68:6d:61:63:2d:73 -sha2-512,hmac-s
00000310 68:61:31:00:00:00:d5:75:6d:61:63:2d:36:34:2d:65 ha1....umac-64-e
00000320 74:6d:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:75 [email protected],u
00000330 6d:61:63:2d:31:32:38:2d:65:74:6d:40:6f:70:65:6e mac-128-etm@open
00000340 73:73:68:2e:63:6f:6d:2c:68:6d:61:63:2d:73:68:61 ssh.com,hmac-sha
00000350 32:2d:32:35:36:2d:65:74:6d:40:6f:70:65:6e:73:73 2-256-etm@openss
00000360 68:2e:63:6f:6d:2c:68:6d:61:63:2d:73:68:61:32:2d h.com,hmac-sha2-
00000370 35:31:32:2d:65:74:6d:40:6f:70:65:6e:73:73:68:2e 512-etm@openssh.
00000380 63:6f:6d:2c:68:6d:61:63:2d:73:68:61:31:2d:65:74 com,hmac-sha1-et
00000390 6d:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:2c:75:6d [email protected],um
000003a0 61:63:2d:36:34:40:6f:70:65:6e:73:73:68:2e:63:6f [email protected]
000003b0 6d:2c:75:6d:61:63:2d:31:32:38:40:6f:70:65:6e:73 m,umac-128@opens
000003c0 73:68:2e:63:6f:6d:2c:68:6d:61:63:2d:73:68:61:32 sh.com,hmac-sha2
000003d0 2d:32:35:36:2c:68:6d:61:63:2d:73:68:61:32:2d:35 -256,hmac-sha2-5
000003e0 31:32:2c:68:6d:61:63:2d:73:68:61:31:00:00:00:15 12,hmac-sha1....
000003f0 6e:6f:6e:65:2c:7a:6c:69:62:40:6f:70:65:6e:73:73 none,zlib@openss
00000400 68:2e:63:6f:6d:00:00:00:15:6e:6f:6e:65:2c:7a:6c h.com....none,zl
00000410 69:62:40:6f:70:65:6e:73:73:68:2e:63:6f:6d:00:00 [email protected]..
00000420 00:00:00:00:00:00:00:00:00:00:00 ...........
-> NET_SSH2_MSG_KEX_ECDH_INIT (since last: 0.0005, network: 0s)
00000000 00:00:00:20:6e:a4:2f:fc:61:35:20:91:43:48:f1:1c ... n./.a5 .CH..
00000010 26:43:f4:9d:cd:d3:de:b0:57:f7:a9:76:9a:7c:a0:63 &C......W..v.|.c
00000020 ad:eb:10:62 ...b
<- NET_SSH2_MSG_KEX_ECDH_REPLY (since last: 0.1185, network: 0.1185s)
00000000 00:00:00:33:00:00:00:0b:73:73:68:2d:65:64:32:35 ...3....ssh-ed25
00000010 35:31:39:00:00:00:20:42:e7:59:55:bc:26:b2:35:b9 519... B.YU.&.5.
00000020 c1:20:5a:59:40:59:85:ed:1d:c4:c7:31:7f:ee:0b:d7 . [email protected]....
00000030 11:6f:a6:a2:c1:6c:be:00:00:00:20:ea:5f:f9:58:8c .o...l.... ._.X.
00000040 ae:03:29:7f:37:83:bb:a4:92:21:bc:b0:cd:32:63:a1 ..).7....!...2c.
00000050 ef:38:53:b9:e3:d4:0d:d9:ed:d6:4d:00:00:00:53:00 .8S.......M...S.
00000060 00:00:0b:73:73:68:2d:65:64:32:35:35:31:39:00:00 ...ssh-ed25519..
00000070 00:40:64:fa:ee:9b:33:51:99:90:b8:db:e1:d8:ef:92 [email protected]........
00000080 94:d7:04:de:bc:fe:8b:4d:cb:01:46:eb:60:0d:f5:72 .......M..F.`..r
00000090 c1:1b:60:7f:a1:15:b9:79:b9:fc:c1:e9:c1:fa:bc:1a ..`....y........
000000a0 65:bf:83:65:6f:85:bb:7e:10:d0:0c:af:9d:19:6b:5f e..eo..~......k_
000000b0 eb:0d ..
-> NET_SSH2_MSG_NEWKEYS (since last: 0.0002, network: 0s)
<- NET_SSH2_MSG_NEWKEYS (since last: 0, network: 0s)
-> NET_SSH2_MSG_SERVICE_REQUEST (since last: 0.0002, network: 0s)
00000000 00:00:00:0c:73:73:68:2d:75:73:65:72:61:75:74:68 ....ssh-userauth
<- NET_SSH2_MSG_SERVICE_ACCEPT (since last: 0.2671, network: 0.2671s)
00000000 00:00:00:0c:73:73:68:2d:75:73:65:72:61:75:74:68 ....ssh-userauth
-> NET_SSH2_MSG_USERAUTH_REQUEST (since last: 0.0001, network: 0s)
00000000 00:00:00:04:72:6f:6f:74:00:00:00:0e:73:73:68:2d ....root....ssh-
00000010 63:6f:6e:6e:65:63:74:69:6f:6e:00:00:00:04:6e:6f connection....no
00000020 6e:65 ne
<- NET_SSH2_MSG_USERAUTH_FAILURE (since last: 0.1204, network: 0.1204s)
00000000 00:00:00:12:70:75:62:6c:69:63:6b:65:79:2c:70:61 ....publickey,pa
00000010 73:73:77:6f:72:64:00 ssword.
-> NET_SSH2_MSG_USERAUTH_REQUEST (since last: 0.0001, network: 0s)
00000000 00:00:00:04:72:6f:6f:74:00:00:00:0e:73:73:68:2d ....root....ssh-
00000010 63:6f:6e:6e:65:63:74:69:6f:6e:00:00:00:08:70:61 connection....pa
00000020 73:73:77:6f:72:64:00:00:00:00:08:70:61:73:73:77 ssword.....passw
00000030 6f:72:64 ord
<- NET_SSH2_MSG_USERAUTH_SUCCESS (since last: 0.1676, network: 0.1675s)
-> NET_SSH2_MSG_CHANNEL_OPEN (since last: 0.0003, network: 0s)
00000000 00:00:00:07:73:65:73:73:69:6f:6e:00:00:00:01:7f ....session.....
00000010 ff:ff:ff:00:00:40:00 .....@.
I also have to mention that this is long running script. However it produces this error only for 1 out many linux boxes.
Out of curiosity, what does echo $ssh->isTimeout() ? 'y' : 'n' give you? I'm guessing that it's gonna output "y". If so then the reason you're getting that error is because the server never sent the appropriate response, in time. Like it's reasonable that you get an error altho it might be useful if the error were more useful.
I created a branch on my own fork of the phpseclib repo that makes the error message a little more useful here:
https://github.com/terrafrost/phpseclib/commit/4a79a24a6c86edcf16fd332bd3cf5d241eff9241
That said, assuming that this is all correct then you should probably look at the server logs. Like enable verbose logging on the server and see what the server logs are saying. Normally I do that by doing sudo /usr/sbin/sshd -ddd -p2222 but who knows if you have that level of access to the SSH server
@terrafrost ty for reply. Yes you are right it's a timeout and execution maches setTimeout($seconds) Do I understand correctly that this errors means connection failed to be established during setTimeout($seconds) ? And it's not related to long executed command?
Do I understand correctly that this errors means connection failed to be established during setTimeout($seconds) ? And it's not related to long executed command?
Correct. Per your logs it's timing out before phpseclib has even had a chance to send the command. So the way SSH2 works is... you, the client, open up a channel. Once the server confirms that the channel has been opened you, the client, send an "exec" channel request with the command you're wanting executed. The server isn't even responding with the confirmation that the channel has been opened so phpseclib is error'ing out before it would normally send the command.
Ok that makes sense. Anyways I don't care about error message anymore as I know what this means. Thank you for all the help
@terrafrost I used your suggestion and did sudo /usr/sbin/sshd -ddd -p2222 to get to the root of the problem.
Most of the requests are going out without any problems.
However this is the example where it's delaying 5 seconds (sometimes it's even more)
Do you have anything to suggest/recommend? P.S. I might be wrong but for example when phpstorm OR phpseclib is timing out on connection. I try to do from my local terminal ssh root@IP and it works. Or this can't be true?
On top of that I can mention that I'm running
OpenSSH_8.9p1 Ubuntu-3, OpenSSL 3.0.2 15 Mar 2022 I also have another server with exactly same version and there's no such issues there.
idk a ton about the internals of OpenSSH / Linux's PAM. I've posted your question on the [email protected] mailing list to see if the people there might have some insights.
It could be interesting to see more of the logs as well. Like where it's opening the channel. The screenshot you posted is just showing the key exchange debug info. Like phpseclib, by default, will time out after 10s, so there's prob still some time consuming stuff going on outside of the screenshot that you sent.
@terrafrost thank you for helping out. It's super easy for me to reproduce this. I get same thing in max 20 tries. https://pastebin.com/hnqdhnLn Here I'm attaching full sshd log from start to end.
Haven't gotten any responses from my email yet but I did a Google search for debug3: PAM: sshpam_store_conv called with 1 messages and found this:
https://ubuntuforums.org/showthread.php?t=1448030&s=fc11356aef29997dd92695cf54b97c8d&p=10399729#post10399729
Hmm based on that thread
https://bugs.launchpad.net/ubuntu/+source/landscape-client/+bug/519930 - not this as I don't have remote mounts
UseDNS - already set to no
Not related to pam_ck_connector. I'm not using
GSSAPIAuthentication no - didn't helped
#session optional pam_systemd.so - didn't helped
I've also ran with strace and nothing around that hanging line.
I also have to mention that this hang-up takes exactly 9-10 seconds. And changing phpseclib timeout doesn't change anything. On top of that when creating new SSH2 class I pass 2 seconds timeout. And it's not being respected. It still waits out all 9-10 seconds.