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Ubuntu 14.04 ESM: USN-4745-1 Moderate: OpenSSL DoS Issues

ubuntu
Calendar Grey February 23, 2021
Dist Ubuntu Esm H88
Ubuntu Security Update USN-4745-1 tackles various OpenSSL flaws, providing remediation steps for impacted releases.
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

Details:

David Benjamin discovered that OpenSSL incorrectly handled comparing

certificates containing a EDIPartyName name type. A remote attacker could

possibly use this issue to cause OpenSSL to crash, resulting in a denial of

service. (CVE-2020-1971)

Tavis Ormandy discovered that OpenSSL incorrectly handled parsing issuer

fields. A remote attacker could possibly use this issue to cause OpenSSL to

crash, resulting in a denial of service. (CVE-2021-23841)

Topics%20covered

Topics Covered

security advisory denial of service encryption DoS Ubuntu OpenSSL vulnerability update instructions SSL

Update Instructions

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

Ubuntu 14.04 ESM:
  libssl1.0.0                     1.0.1f-1ubuntu2.27+esm2

Ubuntu 12.04 ESM:
  libssl1.0.0                     1.0.1-4ubuntu5.45

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

References

https://ubuntu.com/security/notices/USN-4745-1

CVE-2020-1971, CVE-2021-23841

February 23, 2021

Topics%20covered

Topics Covered

security advisory denial of service encryption DoS Ubuntu OpenSSL vulnerability update instructions SSL

Package Information

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