** Changed in: openssh (Debian)
Status: New = Fix Released
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https://bugs.launchpad.net/bugs/1287222
Title:
openssh-client 6.5 regression bug with certain servers
This bug was fixed in the package openssh - 1:6.9p1-1
---
openssh (1:6.9p1-1) unstable; urgency=medium
* New upstream release (http://www.openssh.com/txt/release-6.8):
- sshd(8): UseDNS now defaults to 'no'. Configurations that match
against the client host name (via
This was fixed upstream according to the changelog.
http://www.openssh.com/txt/release-6.9:
* ssh(1), sshd(8): cap DH-GEX group size at 4Kbits for Cisco
implementations as some would fail when attempting to use group
sizes 4K; bz#2209
HTH,
Simon
** Bug watch added: OpenSSH Portable
Looks like there's a patch for openssh available the RH bug which
detects broken server implementations and sends options that they can
accept (by matching Cisco-* in the banner).
We probably don't want to have to maintain this patch in Ubuntu
indefinitely though. But we could cherry-pick it if
The workaround is fine, but if you want more detailed description about the
underlying issues (there are more than one) see the Red Hat bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1026430
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** Bug watch added: Debian Bug tracker #740307
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=740307
** Also affects: openssh (Debian) via
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=740307
Importance: Unknown
Status: Unknown
** Also affects: openssh (Fedora) via
Bug was fixed https://tools.cisco.com/bugsearch/bug/CSCuo76464
(sorry, you need Cisco account). So, I think that this is not a bug, but a
configuration incompatibility.
Simple explanation: openSSH require more security and external ssh server is
not using this level of security.
--
You
Last Modified:
Jul 31,2014
Status:
Fixed
Severity:
3 Moderate
Product:
Cisco IOS
Support Cases:
2
Known Affected Releases:
(1)
n/a
Known Fixed Releases:
(6)
15.5(0.6)T
15.4(1)T1.3
15.3(3)S3.4
15.5(0.12)S
15.1(2)SY3.8
15.4(1)T2
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** Changed in: openssh (Debian)
Status: Unknown = New
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https://bugs.launchpad.net/bugs/1287222
Title:
openssh-client 6.5 regression bug with certain servers
I've filed the bug CSCuo76464 to get this fixed on the cisco side.
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https://bugs.launchpad.net/bugs/1287222
Title:
openssh-client 6.5 regression bug with certain
I also hit this connecting to Cisco, log from cisco:
SSH2 0: Invalid modulus length
For me
ssh -o KexAlgorithms=diffie-hellman-group14-sha1 x.x.x.x
works fine.
It affects not all Cisco, mainly old ones are not affected.
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Ciphers
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc
HostKeyAlgorithms ssh-rsa,ssh-dss
KexAlgorithms diffie-hellman-group1-sha1
MACs hmac-md5,hmac-sha1,umac...@openssh.com,hmac-ripemd160
In /etc/ssh/ssh_config resolve the issue. I would say this is not a
** Tags added: trusty
** Tags removed: trusty
** Tags added: regression-release
** Tags added: trusty
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https://bugs.launchpad.net/bugs/1287222
Title:
openssh-client
That work around did not work for all the devices in my network sadly.
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https://bugs.launchpad.net/bugs/1287222
Title:
openssh-client 6.5 regression bug with certain
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: openssh (Ubuntu)
Status: New = Confirmed
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I'm finding this with my cisco routers/switches. Everything else seems
to work. Also this bug seems related
https://bugzilla.redhat.com/show_bug.cgi?id=1026430
** Bug watch added: Red Hat Bugzilla #1026430
https://bugzilla.redhat.com/show_bug.cgi?id=1026430
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Also the work around suggested in that thread:
ssh -o HostKeyAlgorithms=ssh-rsa,ssh-dss -o KexAlgorithms=diffie-
hellman-group1-sha1 -o Ciphers=aes128-cbc,3des-cbc -o MACs=hmac-md5
,hmac-sha1 destination
allows me to connect.
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