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Ubuntu 18.04 LTS USN-6709-1 Moderate Denial Of Service: OpenSSL

ubuntu
Calendar Grey March 21, 2024
Dist Ubuntu Esm H88
The Ubuntu Security Notice USN-6709-1 addresses multiple security issues found in OpenSSL pertinent to the 18.04 LTS versions.
Several security issues were fixed in OpenSSL.

Summary

Several security issues were fixed in OpenSSL.

Software Description:

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

Details:

It was discovered that checking excessively long DH keys or parameters

may be very slow. A remote attacker could possibly use this issue to

cause OpenSSL to consume resources, resulting in a denial of service.

(CVE-2023-3446)

After the fix for CVE-2023-3446 Bernd Edlinger discovered that a large

q parameter value can also trigger an overly long computation during

some of these checks. A remote attacker could possibly use this issue

to cause OpenSSL to consume resources, resulting in a denial of

service. (CVE-2023-3817)

David Benjamin discovered that generating excessively long X9.42 DH

keys or checking excessively long X9.42 DH keys or parameters may be

very slow. A remote attacker could possibly use this issue to cause

OpenSSL to consume resources, resulting in a denial of service.

(CVE-2023-5678)

Bahaa Naamneh discovered that ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu OpenSSL resource consumption

Update Instructions

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  libssl1.0.0                     1.0.2n-1ubuntu5.13+esm1

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

References

https://ubuntu.com/security/notices/USN-6709-1

CVE-2023-3446, CVE-2023-3817, CVE-2023-5678, CVE-2024-0727

==========================================================================

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu OpenSSL resource consumption

Package Information

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