Ubuntu Security Notice USN-2547-1
24th March, 2015
mono vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
Several security issues were fixed in Mono.
Software description
- mono
– Mono is a platform for running and developing applications
Details
It was discovered that the Mono TLS implementation was vulnerable to the
SKIP-TLS vulnerability. A remote attacker could possibly use this issue
to perform client impersonation attacks. (CVE-2015-2318)
It was discovered that the Mono TLS implementation was vulnerable to the
FREAK vulnerability. A remote attacker or a man in the middle could
possibly use this issue to force the use of insecure ciphersuites.
(CVE-2015-2319)
It was discovered that the Mono TLS implementation still supported a
fallback to SSLv2. This update removes the functionality as use of SSLv2 is
known to be insecure. (CVE-2015-2320)
It was discovered that Mono incorrectly handled memory in certain
circumstances. A remote attacker could possibly use this issue to cause
Mono to crash, resulting in a denial of service, or to obtain sensitive
information. This issue only applied to Ubuntu 12.04 LTS. (CVE-2011-0992)
It was discovered that Mono incorrectly handled hash collisions. A remote
attacker could possibly use this issue to cause Mono to crash, resulting in
a denial of service. This issue only applied to Ubuntu 12.04 LTS.
(CVE-2012-3543)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 14.10:
-
libmono-2.0-1
3.2.8+dfsg-4ubuntu2.1
-
mono-runtime
3.2.8+dfsg-4ubuntu2.1
- Ubuntu 14.04 LTS:
-
libmono-2.0-1
3.2.8+dfsg-4ubuntu1.1
-
mono-runtime
3.2.8+dfsg-4ubuntu1.1
- Ubuntu 12.04 LTS:
-
libmono-2.0-1
2.10.8.1-1ubuntu2.3
-
mono-runtime
2.10.8.1-1ubuntu2.3
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Mono applications to
make all the necessary changes.