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TITLE:
SquirrelMail G/PGP Encryption Plugin Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA26035

VERIFY ADVISORY:
http://secunia.com/advisories/26035/

CRITICAL:
Highly critical

IMPACT:
Exposure of system information, Exposure of sensitive information,
System access

WHERE:
>From remote

SOFTWARE:
SquirrelMail G/PGP Encryption Plugin 2.x
http://secunia.com/product/14775/

DESCRIPTION:
iDefense has reported some vulnerabilities in the SquirrelMail G/PGP
Encryption Plugin, which can be exploited by malicious users and
malicious people to disclose sensitive information or to compromise a
vulnerable system.

1) An input validation error exists in the "deleteKey()" function,
which can be exploited by to inject and execute arbitrary shell
commands via the "fpr" parameter.

Successful exploitation of this vulnerability requires valid user
credentials.

2) An input validation error exists in the
"gpg_check_sign_pgp_mime()" function, which can be exploited to
inject and execute arbitrary shell commands via the
"messageSignedText" variable when a users opens a specially crafted
email.

3) An input validation error exists in the "gpg_recv_key()" function
in gpg_key_functions.php, which can be exploited to inject and
execute arbitrary shell commands via the "keyserver" parameter.

Successful exploitation of this vulnerability requires valid user
credentials.

4) Input passed to the "help" parameter in gpg_help.php and
gpg_help_base.php is not properly verified before being used to
include files. This can be exploited to include arbitrary files from
local resources.

The vulnerabilities are reported in version 2.0. Vulnerabilities #1
and #3 are also reported in version 2.1. Other versions may also be
affected.

SOLUTION:
Update to version 2.1 and grant only trusted users web access to the
application.

PROVIDED AND/OR DISCOVERED BY:
An anonymous person, reported via iDefense.

ORIGINAL ADVISORY:
1)
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=329
2)
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=330
3)
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=331
4)
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=555

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About:
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