Ubuntu 5053-1: libssh vulnerability

Advisories

==========================================================================
Ubuntu Security Notice USN-5053-1
August 26, 2021

libssh vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.04
- Ubuntu 20.04 LTS

Summary:

libssh could be made to crash or run programs if it received specially
crafted network traffic.

Software Description:
- libssh: A tiny C SSH library

Details:

It was discovered that libssh incorrectly handled rekeying. A remote
attacker could use this issue to cause libssh to crash, resulting in a
denial of service, or possibly execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 21.04:
  libssh-4                        0.9.5-1ubuntu0.1

Ubuntu 20.04 LTS:
  libssh-4                        0.9.3-2ubuntu2.2

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5053-1
  CVE-2021-3634

Package Information:
  https://launchpad.net/ubuntu/+source/libssh/0.9.5-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/libssh/0.9.3-2ubuntu2.2

Ubuntu 5053-1: libssh vulnerability

August 26, 2021

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.04 - Ubuntu 20.04 LTS Summary: libssh could be made to crash or run programs if it received specially crafted network traffic. Software Description: - libssh: A tiny C SSH library Details: It was discovered that libssh incorrectly handled rekeying. A remote attacker could use this issue to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: libssh-4 0.9.5-1ubuntu0.1 Ubuntu 20.04 LTS: libssh-4 0.9.3-2ubuntu2.2 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5053-1

CVE-2021-3634

Severity
Ubuntu Security Notice USN-5053-1

Package Information

https://launchpad.net/ubuntu/+source/libssh/0.9.5-1ubuntu0.1 https://launchpad.net/ubuntu/+source/libssh/0.9.3-2ubuntu2.2

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