USN-4263-1: Sudo vulnerability

Releases

• Ubuntu 19.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• sudo - Provide limited super user privileges to specific users

Details

Joe Vennix discovered that Sudo incorrectly handled memory operations when
the pwfeedback option is enabled. A local attacker could possibly use this
issue to obtain unintended access to the administrator account.

Update instructions

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

Ubuntu 19.10

• sudo - 1.8.27-1ubuntu4.1
• sudo-ldap - 1.8.27-1ubuntu4.1

Ubuntu 18.04

• sudo - 1.8.21p2-3ubuntu1.2
• sudo-ldap - 1.8.21p2-3ubuntu1.2

Ubuntu 16.04

• sudo - 1.8.16-0ubuntu1.9
• sudo-ldap - 1.8.16-0ubuntu1.9

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

References

• CVE-2019-18634

Related notices

• USN-4263-2: sudo-ldap, sudo