UBUNTU-CVE-2020-1968

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    UBUNTU-CVE-2020-1968

    Published: 9 Sept 2020Last Modified: 27 Apr 2026
    Upstream:
    CVE-2020-1968

    Summary:

    Details: The Raccoon attack exploits a flaw in the TLS specification which can lead to an attacker being able to compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite. In such a case this would result in the attacker being able to eavesdrop on all encrypted communications sent over that TLS connection. The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections. Note that this issue only impacts DH ciphersuites and not ECDH ciphersuites. This issue affects OpenSSL 1.0.2 which is out of support and no longer receiving public updates. OpenSSL 1.1.1 is not vulnerable to this issue. Fixed in OpenSSL 1.0.2w (Affected 1.0.2-1.0.2v).

    References: https://ubuntu.com/security/CVE-2020-1968, https://www.openssl.org/news/secadv/20200909.txt, https://ubuntu.com/security/notices/USN-4504-1, https://www.cve.org/CVERecord?id=CVE-2020-1968, https://ubuntu.com/security/notices/USN-7018-1

    Affected packages

    Package

    Name: openssl

    Purl: pkg:deb/ubuntu/[email protected]+esm10?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.0.1f-1ubuntu2.27+esm10

    Affected versions

    1.0.1e-3ubuntu1
    1.0.1e-4ubuntu1
    1.0.1e-4ubuntu2
    1.0.1e-4ubuntu3
    1.0.1e-4ubuntu4
    1.0.1f-1ubuntu1
    1.0.1f-1ubuntu2
    1.0.1f-1ubuntu2.1
    1.0.1f-1ubuntu2.2
    1.0.1f-1ubuntu2.3
    1.0.1f-1ubuntu2.4
    1.0.1f-1ubuntu2.5
    1.0.1f-1ubuntu2.7
    1.0.1f-1ubuntu2.8
    1.0.1f-1ubuntu2.11
    1.0.1f-1ubuntu2.12
    1.0.1f-1ubuntu2.15
    1.0.1f-1ubuntu2.16
    1.0.1f-1ubuntu2.17
    1.0.1f-1ubuntu2.18
    1.0.1f-1ubuntu2.19
    1.0.1f-1ubuntu2.20
    1.0.1f-1ubuntu2.21
    1.0.1f-1ubuntu2.22
    1.0.1f-1ubuntu2.23
    1.0.1f-1ubuntu2.24
    1.0.1f-1ubuntu2.25
    1.0.1f-1ubuntu2.26
    1.0.1f-1ubuntu2.27
    1.0.1f-1ubuntu2.27+esm1
    1.0.1f-1ubuntu2.27+esm2
    1.0.1f-1ubuntu2.27+esm3
    1.0.1f-1ubuntu2.27+esm4
    1.0.1f-1ubuntu2.27+esm5
    1.0.1f-1ubuntu2.27+esm6
    1.0.1f-1ubuntu2.27+esm7
    1.0.1f-1ubuntu2.27+esm9

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2020-1968 | CVE-DB