Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 554
Alerts This Week
Warning Icon 1 554

Ubuntu 20.10, 20.04 LTS, 18.04 LTS OpenSSL Denial Of Service Advisory

ubuntu
Calendar Grey March 25, 2021
Dist Ubuntu Esm H88
OpenSSL security notice: Remote adversaries might leverage specially crafted network packets to induce service failures or execute arbitrary code.
OpenSSL could be made to crash or run programs if it received specially crafted network traffic.

Summary

OpenSSL could be made to crash or run programs if it received specially

crafted network traffic.

Software Description:

- openssl: Secure Socket Layer (SSL) cryptographic library and tools

Details:

It was discovered that OpenSSL incorrectly handled certain renegotiation

ClientHello messages. A remote attacker could use this issue to cause

OpenSSL to crash, resulting in a denial of service, or possibly execute

arbitrary code.

Topics%20covered

Topics Covered

security advisory denial of service security issue Ubuntu OpenSSL network exploit

Update Instructions

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

Ubuntu 20.10:
  libssl1.1                       1.1.1f-1ubuntu4.3

Ubuntu 20.04 LTS:
  libssl1.1                       1.1.1f-1ubuntu2.3

Ubuntu 18.04 LTS:
  libssl1.1                       1.1.1-1ubuntu2.1~18.04.9

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4891-1

CVE-2021-3449

Severity
important
Lowest
Low
Medium
High
Critical

March 25, 2021

Topics%20covered

Topics Covered

security advisory denial of service security issue Ubuntu OpenSSL network exploit

Package Information

https://launchpad.net/ubuntu/+source/openssl/1.1.1f-1ubuntu4.3
https://launchpad.net/ubuntu/+source/openssl/1.1.1f-1ubuntu2.3
https://launchpad.net/ubuntu/+source/openssl/1.1.1-1ubuntu2.1~18.04.9

Get the latest News and Insights

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