MAILsweeper for SMTP 3.x does not properly handle corrupt CDA documents in a ZIP file and hangs, which allows remote attackers to cause a denial of service.

Clearswift MAILsweeper 4.x allows remote attackers to bypass attachment detection via an attachment that does not specify a MIME-Version header field, which is processed by some mail clients.

Clearswift MAILsweeper before 4.3.15 does not properly detect and filter RAR 3.20 encoded files, which allows remote attackers to bypass intended policy.

Clearswift MAILsweeper before 4.3.15 does not properly detect and filter ZIP 6.0 encoded files, which allows remote attackers to bypass intended policy.

Clearswift MAILsweeper before 4.3.15 does not properly detect filenames in BinHex (HQX) encoded files, which allows remote attackers to bypass intended policy.

Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME messages that use whitespace in an unusual fashion, which may be interpreted differently by mail clients.

Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME messages that use malformed quoting in MIME headers, parameters, and values, including (1) fields that should not be quoted, (2) duplicate quotes, or (3) missing leading or trailing quote characters, which may be interpreted differently by mail clients.

MAILsweeper for SMTP 4.3 allows remote attackers to bypass virus protection via a mail message with a malformed zip attachment, as exploited by certain MIMAIL virus variants.

MAILsweeper for SMTP 4.3.6 and 4.3.7 allows remote attackers to cause a denial of service (CPU consumption) via a PowerPoint attachment that either (1) is corrupt or (2) contains "embedded objects."

Clearswift MAILsweeper 4.0 through 4.3.7 allows remote attackers to bypass filtering via a file attachment that contains "multiple extensions combined with large blocks of white space."

Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME messages that use non-standard but frequently supported Content-Transfer-Encoding values such as (1) uuencode, (2) mac-binhex40, and (3) yenc, which may be interpreted differently by mail clients.

Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME messages that use non-standard separator characters, or use standard separators incorrectly, within MIME headers, fields, parameters, or values, which may be interpreted differently by mail clients.

Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME messages that use fields that use RFC2047 encoding, which may be interpreted differently by mail clients.

Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME messages that use RFC2231 encoding, which may be interpreted differently by mail clients.

Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME encapsulation that uses RFC822 comment fields, which may be interpreted as other fields by mail clients.

Multiple stack-based buffer overflows in the get_header function in header.c for LHA 1.14, as used in products such as Barracuda Spam Firewall, allow remote attackers or local users to execute arbitrary code via long directory or file names in an LHA archive, which triggers the overflow when testing or extracting the archive.

Multiple directory traversal vulnerabilities in LHA 1.14 allow remote attackers or local users to create arbitrary files via an LHA archive containing filenames with (1) .. sequences or (2) absolute pathnames with double leading slashes ("//absolute/path").

Directory traversal vulnerability in MIMEsweeper for Web before 5.0.4 allows remote attackers or local users to read arbitrary files via "..\\", "..\", and similar dot dot sequences in the URL.

Clearswift MAILsweeper for SMTP before 4.3_13 allows remote attackers to cause a denial of service (infinite loop) via an e-mail with a crafted RAR archive attached.

Clearswift MIMEsweeper 5.0.5, when it has been upgraded from MAILsweeper for SMTP version 4.3 or MAILsweeper Business Suite I or II, allows remote attackers to bypass scanning by including encrypted data in a mail message, which causes the message to be marked as "Clean" instead of "Encrypted".

Clearswift MIMEsweeper For Web (a.k.a. WEBsweeper) 4.0 through 5.1 allows remote attackers to bypass filtering via a URL that does not include a .exe extension but returns an executable file.

Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows remote attackers to bypass the "text analysis", possibly bypassing SPAM and other filters, by sending an e-mail specifying a non-existent or unrecognized character set.

Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows remote attackers to cause a denial of service via (1) non-ASCII characters in a reverse DNS lookup result from a Received header, which leads to a Receiver service stop, and (2) unspecified vectors involving malformed messages, which causes "unpredictable behavior" that prevents the Security service from processing more messages.

Cross-site scripting (XSS) vulnerability in Clearswift MIMEsweeper for Web before 5.1.15 Hotfix allows remote attackers to inject arbitrary web script or HTML via the URL, which is reflected back in an error message when trying to access a blocked web site.

Clearswift MIMEsweeper for Web before 5.1.15 Hotfix allows remote attackers to cause a denial of service (crash) via an encrypted archived .RAR file, which triggers a scan error and causes the Web Policy Engine service to terminate.