Sunday, March 28, 2021

Ubuntu Security Notice USN-4891-1

Ubuntu Security Notice USN-4891-1
March 25, 2021

openssl vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS


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


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.

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.


Package Information:


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