USN-3692-1: OpenSSL vulnerabilities

Published Jun 26, 2018
·
Updated

Keegan Ryan discovered that OpenSSL incorrectly handled ECDSA key generation. An attacker could possibly use this issue to perform a cache-timing attack and recover private ECDSA keys. (CVE-2018-0495) Guido Vranken discovered that OpenSSL incorrectly handled very large prime values during a key agreement. A remote attacker could possibly use this issue to consume resources, leading to a denial of service. (CVE-2018-0732) Alejandro Cabrera Aldaya, Billy Brumley, Cesar Pereida Garcia and Luis Manuel Alvarez Tapia discovered that OpenSSL incorrectly handled RSA key generation. An attacker could possibly use this issue to perform a cache-timing attack and recover private RSA keys. (CVE-2018-0737)

Affected Software

11 affected componentsFixes available
OpenSSL OpenSSL
All of the following
ubuntu/libssl1.0.0<1.0.2n-1ubuntu5.1
1.0.2n-1ubuntu5.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/libssl1.1<1.1.0g-2ubuntu4.1
1.1.0g-2ubuntu4.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/libssl1.0.0<1.0.2g-1ubuntu13.6
1.0.2g-1ubuntu13.6
Ubuntu Ubuntu=17.10
All of the following
ubuntu/libssl1.0.0<1.0.2g-1ubuntu4.13
1.0.2g-1ubuntu4.13
Ubuntu Ubuntu=16.04
All of the following
ubuntu/libssl1.0.0<1.0.1f-1ubuntu2.26
1.0.1f-1ubuntu2.26
Ubuntu Ubuntu=14.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/libssl1.0.0 to a version that resolves this vulnerability.

    Fixed in 1.0.2n-1ubuntu5.1
  2. Upgrade

    Upgrade ubuntu/libssl1.1 to a version that resolves this vulnerability.

    Fixed in 1.1.0g-2ubuntu4.1
  3. Upgrade

    Upgrade ubuntu/libssl1.0.0 to a version that resolves this vulnerability.

    Fixed in 1.0.2g-1ubuntu13.6
  4. Upgrade

    Upgrade ubuntu/libssl1.0.0 to a version that resolves this vulnerability.

    Fixed in 1.0.2g-1ubuntu4.13
  5. Upgrade

    Upgrade ubuntu/libssl1.0.0 to a version that resolves this vulnerability.

    Fixed in 1.0.1f-1ubuntu2.26

Event History

Jun 26, 2018
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of USN-3692-1?

The severity of USN-3692-1 is high.

2

How can an attacker exploit the vulnerability in USN-3692-1?

An attacker can exploit the vulnerability in USN-3692-1 to perform a cache-timing attack and recover private ECDSA keys.

3

Which software versions are affected by USN-3692-1?

The affected software versions are libssl1.0.0 version 1.0.2n-1ubuntu5.1 and libssl1.1 version 1.1.0g-2ubuntu4.1.

4

How can the vulnerability in USN-3692-1 be fixed?

The vulnerability in USN-3692-1 can be fixed by updating the libssl1.0.0 package to version 1.0.2n-1ubuntu5.1 or updating the libssl1.1 package to version 1.1.0g-2ubuntu4.1.

5

Where can I find more information about USN-3692-1?

You can find more information about USN-3692-1 on the Ubuntu Security website.

Company

Resources

Contact

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