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Ubuntu 14.04 ESM: USN-4376-2 Critical: OpenSSL Padding Attacks

ubuntu
Calendar Grey July 9, 2020
Dist Ubuntu Esm H88
Advisory alert USN-4376-2 regarding Ubuntu mitigates OpenSSL weaknesses impacting numerous editions.
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:

USN-4376-1 fixed several vulnerabilities in OpenSSL. This update provides

the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Cesar Pereida García, Sohaib ul Hassan, Nicola Tuveri, Iaroslav Gridin,

Alejandro Cabrera Aldaya, and Billy Brumley discovered that OpenSSL

incorrectly handled ECDSA signatures. An attacker could possibly use this

issue to perform a timing side-channel attack and recover private ECDSA

keys. (CVE-2019-1547)

Juraj Somorovsky, Robert Merget, and Nimrod Aviram discovered that certain

applications incorrectly used OpenSSL and could be exposed to a padding

oracle attack. A remote attacker could possibly use this issue to decrypt

data. (CVE-2019-1559)

Bernd Edlinger discovered that OpenSSL incorrectly handled certain

decryption functio...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory Ubuntu OpenSSL side-channel attack cryptographic library padding

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+esm1

Ubuntu 12.04 ESM:
  libssl1.0.0                     1.0.1-4ubuntu5.44

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

References

https://ubuntu.com/security/notices/USN-4376-2

https://ubuntu.com/security/notices/USN-4376-1

CVE-2019-1547, CVE-2019-1559, CVE-2019-1563

Severity
critical
Lowest
Low
Medium
High
Critical

July 09, 2020

Topics%20covered

Topics Covered

security advisory Ubuntu OpenSSL side-channel attack cryptographic library padding

Package Information

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