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AUSCERT External Security Bulletin Redistribution
ESB-2018.3173.2
libssh vulnerability
30 November 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libssh
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-10933
Reference: ESB-2018.3135
Original Bulletin:
http://www.ubuntu.com/usn/usn-3795-1
http://www.ubuntu.com/usn/usn-3795-3
Comment: This bulletin contains two (2) Ubuntu security advisories.
Revision History: November 30 2018: Added USN-3795-3
October 18 2018: Initial Release
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Ubuntu Security Notice USN-3795-1
October 17, 2018
libssh vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 18.04 LTS
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
Summary:
libssh could allow unintended access to network services.
Software Description:
- - libssh: A tiny C SSH library
Details:
Peter Winter-Smith discovered that libssh incorrectly handled
authentication when being used as a server. A remote attacker could use
this issue to bypass authentication without any credentials.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
libssh-4 0.8.0~20170825.94fa1e38-1ubuntu0.1
Ubuntu 16.04 LTS:
libssh-4 0.6.3-4.3ubuntu0.1
Ubuntu 14.04 LTS:
libssh-4 0.6.1-0ubuntu3.4
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3795-1
CVE-2018-10933
Package Information:
https://launchpad.net/ubuntu/+source/libssh/0.8.0~20170825.94fa1e38-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libssh/0.6.3-4.3ubuntu0.1
https://launchpad.net/ubuntu/+source/libssh/0.6.1-0ubuntu3.4
==========================================================================
Ubuntu Security Notice USN-3795-3
November 29, 2018
libssh regression
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 18.10
- - Ubuntu 18.04 LTS
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
Summary:
USN-3795-1 and USN-3795-2 introduced a regression in libssh.
Software Description:
- - libssh: A tiny C SSH library
Details:
USN-3795-1 and USN-3795-2 fixed a vulnerability in libssh. The upstream
fix introduced a regression. This update fixes the problem.
Original advisory details:
Peter Winter-Smith discovered that libssh incorrectly handled
authentication when being used as a server. A remote attacker could use
this issue to bypass authentication without any credentials.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.10:
libssh-4 0.8.1-1ubuntu0.3
Ubuntu 18.04 LTS:
libssh-4 0.8.0~20170825.94fa1e38-1ubuntu0.2
Ubuntu 16.04 LTS:
libssh-4 0.6.3-4.3ubuntu0.2
Ubuntu 14.04 LTS:
libssh-4 0.6.1-0ubuntu3.5
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3795-3
https://usn.ubuntu.com/usn/usn-3795-1
https://launchpad.net/bugs/1805348
Package Information:
https://launchpad.net/ubuntu/+source/libssh/0.8.1-1ubuntu0.3
https://launchpad.net/ubuntu/+source/libssh/0.8.0~20170825.94fa1e38-1ubuntu0.2
https://launchpad.net/ubuntu/+source/libssh/0.6.3-4.3ubuntu0.2
https://launchpad.net/ubuntu/+source/libssh/0.6.1-0ubuntu3.5
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