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Ubuntu 14.04 ESM: USN-4510-2 Moderate: Samba Network Access Issue

ubuntu
Calendar Grey September 17, 2020
Dist Ubuntu Esm H88
A flaw in Samba on Ubuntu exposes unauthorized file access over the network. A security patch has been released to rectify this vulnerability.
Samba would allow unintended access to files over the network.

Summary

Samba would allow unintended access to files over the network.

Software Description:

- samba: SMB/CIFS file, print, and login server for Unix

Details:

USN-4510-1 fixed a vulnerability in Samba. This update provides

the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

Tom Tervoort discovered that the Netlogon protocol implemented by Samba

incorrectly handled the authentication scheme. A remote attacker could use

this issue to forge an authentication token and steal the credentials of

the domain admin.

This update fixes the issue by changing the "server schannel" setting to

default to "yes", instead of "auto", which will force a secure netlogon

channel. This may result in compatibility issues with older devices. A

future update may allow a finer-grained control over this setting.

Topics%20covered

Topics Covered

security advisory samba Ubuntu file access network threat

Update Instructions

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

Ubuntu 14.04 ESM:
  samba                           2:4.3.11+dfsg-0ubuntu0.14.04.20+esm9

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

References

https://ubuntu.com/security/notices/USN-4510-2

https://ubuntu.com/security/notices/USN-4510-1

CVE-2020-1472

September 17, 2020

Topics%20covered

Topics Covered

security advisory samba Ubuntu file access network threat

Package Information

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