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Ubuntu 18.04 LTS: USN-3795-1 Critical: Libssh Authentication Bypass

ubuntu
Calendar Grey October 17, 2018
Dist Ubuntu Esm H88
The Ubuntu Security Notification USN-3795-1 highlights a vulnerability in libssh that could lead to unauthorized network entry. Users are advised to upgrade immediately.
libssh could allow unintended access to network services.

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.

Topics%20covered

Topics Covered

security advisory update critical Ubuntu authentication network access libssh

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://ubuntu.com/security/notices/USN-3795-1

CVE-2018-10933

Severity
critical
Lowest
Low
Medium
High
Critical

October 17, 2018

Topics%20covered

Topics Covered

security advisory update critical Ubuntu authentication network access libssh

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

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