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TITLE:
MailEnable Enterprise Multiple WebMail Vulnerabilities

SECUNIA ADVISORY ID:
SA20556

VERIFY ADVISORY:
http://secunia.com/advisories/20556/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, Privilege escalation

WHERE:
>From remote

SOFTWARE:
MailEnable Enterprise Edition 2.x
http://secunia.com/product/10427/
MailEnable Enterprise Edition 1.x
http://secunia.com/product/4325/

DESCRIPTION:
Soroush Dalili has discovered some vulnerabilities in MailEnable
Enterprise, which potentially can be exploited by malicious users to
gain escalated privileges, and by malicious people and users to
bypass certain security restrictions.

1) It is also possible to gain access to certain functionalities in
the web admin page by accessing
"/meadmin/base/enterprise/lang/EN/main.asp" directly and setting the
"POSTOFFICE" parameter to the name of the postoffice. 

2) Input passed to the "LoginRights" parameter in
"/MEWebMail/base/default/lang/EN/MailOptions.asp" isn't properly
sanitised before being used. This can be exploited by a normal user
to change his mailbox type to "SYSADMIN".

3) Access to the
"/MEWebMail/base/default/lang/EN/Forms/MAI/Resolve.asp" script is not
properly restricted. This can be exploited to create emails in any
user's "draft" folder without requiring a valid logon, if the
username is known.

4) Access to the
"/MEWebMail/base/default/lang/EN/Forms/MAI/UploadAttachment.asp"
script is not properly restricted. This can be exploited to upload a
file into any user's "draft" folder without requiring a valid logon.
The file will be saved as "myupload.ams".

5) Access to the
"/MEWebMail/base/enterprise/lang/EN/Forms/vcf/uploadcontact.asp"
script is not properly restricted. This can be exploited to upload a
file into any user's "draft" folder without requiring a valid logon.
The file will be saved as "_myupload.csv".

The vulnerabilities have been confirmed in Enterprise Edition version
2.09. Other versions may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.

Filter malicious requests in a proxy or firewall with URL filtering
capabilities.

PROVIDED AND/OR DISCOVERED BY:
Soroush Dalili, GrayHatz Security Group.

ORIGINAL ADVISORY:
http://www.milw0rm.com/exploits/1893

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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http://secunia.com/about_secunia_advisories/


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