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Ubuntu 22.04 LTS: 7018-2 Severe OpenSSL Vulnerability Exploit

ubuntu
Calendar Grey April 25, 2023
Dist Ubuntu Esm H88
Multiple vulnerabilities were addressed in OpenSSL impacting numerous Ubuntu releases; urgent security patches are recommended.
Several security issues were fixed in OpenSSL.

Summary

Several security issues were fixed in OpenSSL.

Software Description:

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

- openssl1.0: Secure Socket Layer (SSL) cryptographic library and tools

Details:

It was discovered that OpenSSL was not properly managing file locks when

processing policy constraints. If a user or automated system were tricked

into processing a certificate chain with specially crafted policy

constraints, a remote attacker could possibly use this issue to cause a

denial of service. This issue only affected Ubuntu 22.04 LTS and Ubuntu

22.10. (CVE-2022-3996)

David Benjamin discovered that OpenSSL was not properly performing the

verification of X.509 certificate chains that include policy constraints,

which could lead to excessive resource consumption. If a user or automated

system were tricked into processing a specially crafted X.509 certificate

chain that includes policy constraints, a remote attacker could possibly

use t...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical update OpenSSL Ubuntu LTS

Update Instructions

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

Ubuntu 23.04:
   libssl-doc                      3.0.8-1ubuntu1.1
   libssl3                         3.0.8-1ubuntu1.1
   openssl                         3.0.8-1ubuntu1.1

Ubuntu 22.10:
   libssl-doc                      3.0.5-2ubuntu2.2
   libssl3                         3.0.5-2ubuntu2.2
   openssl                         3.0.5-2ubuntu2.2

Ubuntu 22.04 LTS:
   libssl-doc                      3.0.2-0ubuntu1.9
   libssl3                         3.0.2-0ubuntu1.9
   openssl                         3.0.2-0ubuntu1.9

Ubuntu 20.04 LTS:
   libssl-doc                      1.1.1f-1ubuntu2.18
   libssl1.1                       1.1.1f-1ubuntu2.18
   openssl                         1.1.1f-1ubuntu2.18

Ubuntu 18.04 LTS:
   libssl-doc                      1.1.1-1ubuntu2.1~18.04.22
   libssl1.0.0                     1.0.2n-1ubuntu5.12
   libssl1.1                       1.1.1-1ubuntu2.1~18.04.22
   openssl                         1.1.1-1ubuntu2.1~18.04.22
   openssl1.0                      1.0.2n-1ubuntu5.12

Ubuntu 16.04 ESM:
   libssl-doc                      1.0.2g-1ubuntu4.20+esm7
   libssl1.0.0                     1.0.2g-1ubuntu4.20+esm7
   openssl                         1.0.2g-1ubuntu4.20+esm7

Ubuntu 14.04 ESM:
   libssl-doc                      1.0.1f-1ubuntu2.27+esm7
   libssl1.0.0                     1.0.1f-1ubuntu2.27+esm7
   openssl                         1.0.1f-1ubuntu2.27+esm7

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

References

  https://ubuntu.com/security/notices/USN-6039-1

  CVE-2022-3996, CVE-2023-0464, CVE-2023-0466

Severity
critical
Lowest
Low
Medium
High
Critical

April 25, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical update OpenSSL Ubuntu LTS

Package Information

  https://launchpad.net/ubuntu/+source/openssl/3.0.8-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/openssl/3.0.5-2ubuntu2.2
  https://launchpad.net/ubuntu/+source/openssl/3.0.2-0ubuntu1.9
  https://launchpad.net/ubuntu/+source/openssl/1.1.1f-1ubuntu2.18
https://launchpad.net/ubuntu/+source/openssl/1.1.1-1ubuntu2.1~18.04.22
https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu5.12

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