The FWDRV driver in Kerio Personal Firewall 4.2 and Server Firewall 1.1.1 allows local users to cause a denial of service (crash) by setting the PAGE_NOACCESS or PAGE_GUARD protection on the Page Environment Block (PEB), which triggers an exception, aka the "PEB lockout vulnerability."

Unspecified vulnerability in Kerio WinRoute Firewall before 6.1.3 allows remote attackers to authenticate to the service using an account that has been disabled.

Unspecified vulnerability in Kerio WinRoute Firewall before 6.1.3 allows remote attackers to cause a denial of service (crash) via certain RTSP streams.

Multiple unspecified vulnerabilities in Kerio WinRoute Firewall before 6.1.4 Patch 1 allow remote attackers to cause a denial of service via multiple unspecified vectors involving (1) long strings received from Active Directory and (2) the filtering of HTML.

Kerio WinRoute Firewall before 6.1.4 Patch 2 allows attackers to cause a denial of service (CPU consumption and hang) via unknown vectors involving "browsing the web".

Kerio MailServer before 6.1.3 Patch 1 allows remote attackers to cause a denial of service (application crash) via a crafted IMAP LOGIN command.

Unspecified vulnerability in Kerio MailServer before 6.1.4 has unknown impact and remote attack vectors related to a "possible bypass of attachment filter."

Kerio MailServer 5.0 allows remote attackers to cause a denial of service (hang) via SYN packets to the supported network services.

kpf4ss.exe in Sunbelt Kerio Personal Firewall 4.3.x before 4.3.268 does not properly hook the CreateRemoteThread API function, which allows local users to cause a denial of service (crash) and bypass protection mechanisms by calling CreateRemoteThread.

Kerio WinRoute Firewall before 6.2.1 allows remote attackers to cause a denial of service (application crash) via unknown vectors in the "email protocol inspectors," possibly (1) SMTP and (2) POP3.

Multiple cross-site scripting (XSS) vulnerabilities in the Web mail module of Kerio MailServer 5.0 allow remote attackers to execute HTML script as other users via certain URLs.

Kerio Personal Firewall (KPF) 2.1.4 and earlier allows remote attackers to cause a denial of service (hang and CPU consumption) via a SYN packet flood.

Kerio Personal Firewall (KPF) 2.1.4 and earlier allows remote attackers to execute administrator commands by sniffing packets from a valid session and replaying them against the remote administration server.

Buffer overflow in the administrator authentication process for Kerio Personal Firewall (KPF) 2.1.4 and earlier allows remote attackers to execute arbitrary code via a handshake packet.

Multiple buffer overflows in Kerio MailServer 5.6.3 allow remote authenticated users to cause a denial of service and possibly execute arbitrary code via (1) a long showuser parameter in the do_subscribe module, (2) a long folder parameter in the add_acl module, (3) a long folder parameter in the list module, and (4) a long user parameter in the do_map module.

Multiple cross-site scripting (XSS) vulnerabilities in Kerio MailServer 5.6.3 allow remote attackers to insert arbitrary web script via (1) the add_name parameter in the add_acl module, or (2) the alias parameter in the do_map module.

Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows remote attackers to bypass the firewall filters via packets with a source port of 53.

Kerio Winroute Firewall before 6.0.7, ServerFirewall before 1.0.1, and MailServer before 6.0.5 use symmetric encryption for user passwords, which allows attackers to decrypt the user database and obtain the passwords by extracting the secret key from within the software.

Kerio Winroute Firewall before 6.0.9, ServerFirewall before 1.0.1, and MailServer before 6.0.5, when installed on Windows based systems, do not modify the ACLs for critical files, which allows local users with Power Users privileges to modify programs, install malicious DLLs in the plug-ins folder, and modify XML files related to configuration.

The FWDRV.SYS driver in Kerio Personal Firewall 4.1.1 and earlier allows remote attackers to cause a denial of service (CPU consumption and system freeze from infinite loop) via a (1) TCP, (2) UDP, or (3) ICMP packet with a zero length IP Option field.