Amazon Linux 2 Security Advisory: ALAS-2019-1315
Advisory Release Date: 2019-10-11 22:07 Pacific
Advisory Updated Date: 2019-10-14 17:28 Pacific
FAQs regarding Amazon Linux ALAS/CVE Severity
When sudo is configured to allow a user to run commands as an arbitrary user via the ALL keyword in a Runas specification, it is possible to run commands as root by specifying the user ID -1 or 4294967295.
This can be used by a user with sufficient sudo privileges to run commands as root even if the Runas specification explicitly disallows root access as long as the ALL keyword is listed first in the Runas specification. (CVE-2019-14287)
Further details can be found here: https://www.sudo.ws/alerts/minus_1_uid.html
A flaw was found in the way sudo parsed tty information from the process status file in the proc filesystem. A local user with privileges to execute commands via sudo could use this flaw to escalate their privileges to root.(CVE-2017-1000367)
It was found that the original fix for CVE-2017-1000367 was incomplete. A flaw was found in the way sudo parsed tty information from the process status file in the proc filesystem. A local user with privileges to execute commands via sudo could use this flaw to escalate their privileges to root.(CVE-2017-1000368)
Affected Packages:
sudo
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update sudo to update your system.
aarch64:
sudo-1.8.23-4.amzn2.0.1.aarch64
sudo-devel-1.8.23-4.amzn2.0.1.aarch64
sudo-debuginfo-1.8.23-4.amzn2.0.1.aarch64
i686:
sudo-1.8.23-4.amzn2.0.1.i686
sudo-devel-1.8.23-4.amzn2.0.1.i686
sudo-debuginfo-1.8.23-4.amzn2.0.1.i686
src:
sudo-1.8.23-4.amzn2.0.1.src
x86_64:
sudo-1.8.23-4.amzn2.0.1.x86_64
sudo-devel-1.8.23-4.amzn2.0.1.x86_64
sudo-debuginfo-1.8.23-4.amzn2.0.1.x86_64