Advisory Published

USN-2639-1: OpenSSL vulnerabilities

First published: Thu Jun 11 2015(Updated: )

Praveen Kariyanahalli, Ivan Fratric and Felix Groebert discovered that OpenSSL incorrectly handled memory when buffering DTLS data. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2014-8176) Joseph Barr-Pixton discovered that OpenSSL incorrectly handled malformed ECParameters structures. A remote attacker could use this issue to cause OpenSSL to hang, resulting in a denial of service. (CVE-2015-1788) Robert Swiecki and Hanno Böck discovered that OpenSSL incorrectly handled certain ASN1_TIME strings. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2015-1789) Michal Zalewski discovered that OpenSSL incorrectly handled missing content when parsing ASN.1-encoded PKCS#7 blobs. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2015-1790) Emilia Käsper discovered that OpenSSL incorrectly handled NewSessionTicket when being used by a multi-threaded client. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2015-1791) Johannes Bauer discovered that OpenSSL incorrectly handled verifying signedData messages using the CMS code. A remote attacker could use this issue to cause OpenSSL to hang, resulting in a denial of service. (CVE-2015-1792) As a security improvement, this update also modifies OpenSSL behaviour to reject DH key sizes below 768 bits, preventing a possible downgrade attack.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/libssl1.0.0<1.0.1f-1ubuntu11.4
1.0.1f-1ubuntu11.4
=15.04
All of
ubuntu/libssl1.0.0<1.0.1f-1ubuntu9.8
1.0.1f-1ubuntu9.8
=14.10
All of
ubuntu/libssl1.0.0<1.0.1f-1ubuntu2.15
1.0.1f-1ubuntu2.15
=14.04
All of
ubuntu/libssl1.0.0<1.0.1-4ubuntu5.31
1.0.1-4ubuntu5.31
=12.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2014-8176?

    The severity of CVE-2014-8176 is high.

  • How does CVE-2014-8176 affect OpenSSL?

    CVE-2014-8176 affects OpenSSL by causing it to incorrectly handle memory when buffering DTLS data.

  • What is the remedy for CVE-2014-8176 in Ubuntu 15.04?

    The remedy for CVE-2014-8176 in Ubuntu 15.04 is to upgrade to version 1.0.1f-1ubuntu11.4 of libssl1.0.0.

  • What is the remedy for CVE-2014-8176 in Ubuntu 14.10?

    The remedy for CVE-2014-8176 in Ubuntu 14.10 is to upgrade to version 1.0.1f-1ubuntu9.8 of libssl1.0.0.

  • What is the remedy for CVE-2014-8176 in Ubuntu 14.04?

    The remedy for CVE-2014-8176 in Ubuntu 14.04 is to upgrade to version 1.0.1f-1ubuntu2.15 of libssl1.0.0.

  • What is the remedy for CVE-2014-8176 in Ubuntu 12.04?

    The remedy for CVE-2014-8176 in Ubuntu 12.04 is to upgrade to version 1.0.1-4ubuntu5.31 of libssl1.0.0.

  • What are some other vulnerabilities affecting libssl1.0.0 in Ubuntu?

    Some other vulnerabilities affecting libssl1.0.0 in Ubuntu include CVE-2015-1788 and CVE-2015-1789.

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