Alerts This Week
Warning Icon 1 758
Alerts This Week
Warning Icon 1 758

Ubuntu 19.10 & 18.04 LTS: USN-4294-1 Critical OpenSMTPD Threats

ubuntu
Calendar Grey March 2, 2020
Dist Ubuntu Esm H88
Multiple vulnerabilities resolved in OpenSMTPD for Ubuntu versions 18.04 and 19.10. Enhanced security measures implemented to mitigate remote exploitation threats.
Several security issues were fixed in opensmtpd.

Summary

Several security issues were fixed in opensmtpd.

Software Description:

- opensmtpd: secure, reliable, lean, and easy-to configure SMTP server

Details:

It was discovered that OpenSMTPD mishandled certain input. A remote,

unauthenticated attacker could use this vulnerability to execute arbitrary

shell commands as any non-root user. (CVE-2020-8794)

It was discovered that OpenSMTPD did not properly handle hardlinks under

certain conditions. An unprivileged local attacker could read the first

line of any file on the filesystem. (CVE-2020-8793)

Topics%20covered

Topics Covered

security advisory local attack ubuntu input handling opensmtpd

Update Instructions

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

Ubuntu 19.10:
  opensmtpd                       6.0.3p1-6ubuntu0.2

Ubuntu 18.04 LTS:
  opensmtpd                       6.0.3p1-1ubuntu0.2

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

References

https://ubuntu.com/security/notices/USN-4294-1

CVE-2020-8793, CVE-2020-8794

Severity
critical
Lowest
Low
Medium
High
Critical

March 02, 2020

Topics%20covered

Topics Covered

security advisory local attack ubuntu input handling opensmtpd

Package Information

https://launchpad.net/ubuntu/+source/opensmtpd/6.0.3p1-6ubuntu0.2
https://launchpad.net/ubuntu/+source/opensmtpd/6.0.3p1-1ubuntu0.2

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here