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Ubuntu Security Notice USN-2537-1

Ubuntu Security Notice USN-2537-1
Posted Mar 20, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2537-1 - 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. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2015-0209, CVE-2015-0286, CVE-2015-0287, CVE-2015-0288, CVE-2015-0289, CVE-2015-0292, CVE-2015-0293
MD5 | af6954b41cf8921ca646fd8bce9c0314

Ubuntu Security Notice USN-2537-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-2537-1
March 19, 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 K=C3=A4sper 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 K=C3=A4sper 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

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

References:
http://www.ubuntu.com/usn/usn-2537-1
CVE-2015-0209, CVE-2015-0286, CVE-2015-0287, CVE-2015-0288,
CVE-2015-0289, CVE-2015-0292, CVE-2015-0293

Package Information:
https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu9.4
https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.11
https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.25
https://launchpad.net/ubuntu/+source/openssl/0.9.8k-7ubuntu8.27
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