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Ubuntu 16.04 ESM USN-5051-2 Critical: OpenSSL ASN.1 Exploit

ubuntu
Calendar Grey August 26, 2021
Dist Ubuntu Esm H88
Ubuntu Security Announcement USN-5142-1 highlights a serious OpenSSL vulnerability that could lead to private data leaks or application crashes from ASN.1 processing.
OpenSSL could be made to crash or expose sensitive information if it received a specially crafted ASN.1 string.

Summary

OpenSSL could be made to crash or expose sensitive information

if it received a specially crafted ASN.1 string.

Software Description:

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

Details:

USN-5051-1 fixed a vulnerability in OpenSSL. This update provides

the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

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)

Topics%20covered

Topics Covered

security advisory denial of service ubuntu openssl sensitive information exposure

Update Instructions

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

Ubuntu 16.04 ESM:
  libssl1.0.0                     1.0.2g-1ubuntu4.20+esm1

Ubuntu 14.04 ESM:
  libssl1.0.0                     1.0.1f-1ubuntu2.27+esm3

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

References

https://ubuntu.com/security/notices/USN-5051-2

https://ubuntu.com/security/notices/USN-5051-1

CVE-2021-3712

Severity
critical
Lowest
Low
Medium
High
Critical

August 26, 2021

Topics%20covered

Topics Covered

security advisory denial of service ubuntu openssl sensitive information exposure

Package Information

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