openssl vulnerabilities

12 January 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

Pieter Wuille discovered that OpenSSL incorrectly handled Bignum squaring. (CVE-2014-3570)

Markus Stenberg discovered that OpenSSL incorrectly handled certain crafted DTLS messages. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2014-3571)

Karthikeyan Bhargavan discovered that OpenSSL incorrectly handled certain handshakes. A remote attacker could possibly use this issue to downgrade to ECDH, removing forward secrecy from the ciphersuite. (CVE-2014-3572)

Antti Karjalainen, Tuomo Untinen and Konrad Kraszewski discovered that OpenSSL incorrectly handled certain certificate fingerprints. A remote attacker could possibly use this issue to trick certain applications that rely on the uniqueness of fingerprints. (CVE-2014-8275)

Karthikeyan Bhargavan discovered that OpenSSL incorrectly handled certain key exchanges. A remote attacker could possibly use this issue to downgrade the security of the session to EXPORT_RSA. (CVE-2015-0204)

Karthikeyan Bhargavan discovered that OpenSSL incorrectly handled client authentication. A remote attacker could possibly use this issue to authenticate without the use of a private key in certain limited scenarios. This issue only affected Ubuntu 14.04 LTS and Ubuntu 14.10. (CVE-2015-0205)

Chris Mueller discovered that OpenSSL incorrect handled memory when processing DTLS records. A remote attacker could use this issue to cause OpenSSL to consume resources, resulting in a denial of service. This issue only affected Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 14.10. (CVE-2015-0206)

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-1ubuntu9.1

Ubuntu 14.04 LTS

libssl1.0.0 - 1.0.1f-1ubuntu2.8

Ubuntu 12.04 LTS

libssl1.0.0 - 1.0.1-4ubuntu5.21

Ubuntu 10.04 LTS

libssl0.9.8 - 0.9.8k-7ubuntu8.23

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

• CVE-2014-3570
• CVE-2014-3571
• CVE-2014-3572
• CVE-2014-8275
• CVE-2015-0204
• CVE-2015-0205
• CVE-2015-0206