An OpenSSL security update has been released for Ubuntu Linux 18.04 LTS.
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Ubuntu Security Notice USN-5051-3
August 26, 2021
openssl1.0 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
Summary:
OpenSSL could be made to crash or expose sensitive information
if it received a specially crafted ASN.1 string.
Software Description:
- openssl1.0: Secure Socket Layer (SSL) cryptographic library and tools
Details:
USN-5051-1 fixed a vulnerability in OpenSSL. This update provides the
corresponding update for the openssl1.0 package in Ubuntu 18.04 LTS.
Original advisory details:
Ingo Schwarze discovered that OpenSSL incorrectly handled certain ASN.1
strings. A remote attacker could use this issue to cause OpenSSL to crash,
resulting in a denial of service, or possibly obtain sensitive information.
(CVE-2021-3712)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
libssl1.0.0 1.0.2n-1ubuntu5.7
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5051-3
https://ubuntu.com/security/notices/USN-5051-1
CVE-2021-3712
Package Information:
https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu5.7
