1. Ubuntu Security Notices
  2. USN-826-1

USN-826-1: Mono vulnerabilities

Publication date

26 August 2009

Overview

Mono vulnerabilities

Releases

Packages

Details

It was discovered that the XML HMAC signature system did not correctly
check certain lengths. If an attacker sent a truncated HMAC, it could
bypass authentication, leading to potential privilege escalation.
(CVE-2009-0217)

It was discovered that Mono did not properly escape certain attributes in
the ASP.net class libraries which could result in browsers becoming
vulnerable to cross-site scripting attacks when processing the output. With
cross-site scripting vulnerabilities, if a user were tricked into viewing
server output during a crafted server request, a remote attacker could
exploit this to modify the contents, or steal confidential data (such as
passwords), within the same domain. This issue only affected Ubuntu 8.04
LTS. (CVE-2008-3422)

It was discovered that Mono did not properly filter CRLF injections in the
query string. If a user were...

It was discovered that the XML HMAC signature system did not correctly
check certain lengths. If an attacker sent a truncated HMAC, it could
bypass authentication, leading to potential privilege escalation.
(CVE-2009-0217)

It was discovered that Mono did not properly escape certain attributes in
the ASP.net class libraries which could result in browsers becoming
vulnerable to cross-site scripting attacks when processing the output. With
cross-site scripting vulnerabilities, if a user were tricked into viewing
server output during a crafted server request, a remote attacker could
exploit this to modify the contents, or steal confidential data (such as
passwords), within the same domain. This issue only affected Ubuntu 8.04
LTS. (CVE-2008-3422)

It was discovered that Mono did not properly filter CRLF injections in the
query string. If a user were tricked into viewing server output during a
crafted server request, a remote attacker could exploit this to modify the
contents, steal confidential data (such as passwords), or perform
cross-site request forgeries. This issue only affected Ubuntu 8.04 LTS.
(CVE-2008-3906)

Update instructions

In general, a standard system upgrade is sufficient to effect the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
9.04 jaunty libmono-security2.0-cil –  2.0.1-4ubuntu0.1
libmono-system-web2.0-cil –  2.0.1-4ubuntu0.1
libmono-system-web1.0-cil –  2.0.1-4ubuntu0.1
libmono-security1.0-cil –  2.0.1-4ubuntu0.1
8.10 intrepid libmono-security2.0-cil –  1.9.1+dfsg-4ubuntu2.1
libmono-system-web2.0-cil –  1.9.1+dfsg-4ubuntu2.1
libmono-system-web1.0-cil –  1.9.1+dfsg-4ubuntu2.1
libmono-security1.0-cil –  1.9.1+dfsg-4ubuntu2.1
8.04 hardy libmono-security2.0-cil –  1.2.6+dfsg-6ubuntu3.1
libmono-system-web2.0-cil –  1.2.6+dfsg-6ubuntu3.1
libmono-system-web1.0-cil –  1.2.6+dfsg-6ubuntu3.1
libmono-security1.0-cil –  1.2.6+dfsg-6ubuntu3.1

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References

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