Ubuntu Security Notice USN-2537-1
19th 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 version:
- 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.