USN-2537-1: OpenSSL vulnerabilities

19 March 2015

openssl vulnerabilities

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

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in OpenSSL.

Software Description

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

Details

It was discovered that OpenSSL incorrectly handled malformed EC private key files. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2015-0209)

Stephen Henson discovered that OpenSSL incorrectly handled comparing ASN.1 boolean types. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2015-0286)

Emilia Käsper discovered that OpenSSL incorrectly handled ASN.1 structure reuse. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2015-0287)

Brian Carpenter discovered that OpenSSL incorrectly handled invalid certificate keys. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2015-0288)

Michal Zalewski discovered that OpenSSL incorrectly handled missing outer ContentInfo when parsing PKCS#7 structures. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2015-0289)

Robert Dugal and David Ramos discovered that OpenSSL incorrectly handled decoding Base64 encoded data. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2015-0292)

Sean Burford and Emilia Käsper discovered that OpenSSL incorrectly handled specially crafted SSLv2 CLIENT-MASTER-KEY messages. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2015-0293)

Update instructions

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

Ubuntu 14.10
libssl1.0.0 - 1.0.1f-1ubuntu9.4
Ubuntu 14.04 LTS
libssl1.0.0 - 1.0.1f-1ubuntu2.11
Ubuntu 12.04 LTS
libssl1.0.0 - 1.0.1-4ubuntu5.25
Ubuntu 10.04 LTS
libssl0.9.8 - 0.9.8k-7ubuntu8.27

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References