Ubuntu Security Notice USN-2459-1
12th 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 version:
- 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.