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Ubuntu Security Notice USN-6188-1

Ubuntu Security Notice 6188-1 - Matt Caswell discovered that OpenSSL incorrectly handled certain ASN.1 object identifiers. A remote attacker could possibly use this issue to cause OpenSSL to consume resources, resulting in a denial of service.

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#vulnerability#ubuntu#dos#ssl

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Ubuntu Security Notice USN-6188-1
June 22, 2023

openssl vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 16.04 LTS (Available with Ubuntu Pro)
  • Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

OpenSSL could be made to consume resources and cause long
delays if it processed certain input.

Software Description:

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

Details:

Matt Caswell discovered that OpenSSL incorrectly handled certain ASN.1
object identifiers. A remote attacker could possibly use this issue to
cause OpenSSL to consume resources, resulting in a denial of service.

Update instructions:

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

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
libssl1.0.0 1.0.2g-1ubuntu4.20+esm9
openssl 1.0.2g-1ubuntu4.20+esm9

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
libssl1.0.0 1.0.1f-1ubuntu2.27+esm9
openssl 1.0.1f-1ubuntu2.27+esm9

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

References:
https://ubuntu.com/security/notices/USN-6188-1
CVE-2023-2650

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