Nortel VPN Router (aka Contivity) 1000, 2000, 4000, and 5000 before 6_05.140 uses a fixed DES key to encrypt passwords, which allows remote authenticated users to obtain a password via a brute force attack on a hash from the LDAP store.

Nortel VPN Router (aka Contivity) 1000, 2000, 4000, and 5000 before 5_05.149, 5_05.3xx before 5_05.304, and 6.x before 6_05.140 includes the FIPSecryptedtest1219 and FIPSunecryptedtest1219 default accounts in the LDAP template, which might allow remote attackers to access the private network.

Nortel VPN Router (aka Contivity) 1000, 2000, 4000, and 5000 before 5_05.149, 5_05.3xx before 5_05.304, and 6.x before 6_05.140 has two template HTML files lacking certain verification tags, which allows remote attackers to access the administration interface and change the device configuration via certain requests.

Nortel Networks CallPilot and Meridian Mail voicemail systems, when a mailbox has auto logon enabled, allow remote attackers to retrieve or remove messages, or reconfigure the mailbox, by spoofing Calling Number Identification (CNID, aka Caller ID).

The Net Direct client for Linux before 6.0.5 in Nortel Application Switch 2424, VPN 3050 and 3070, and SSL VPN Module 1000 extracts and executes files with insecure permissions, which allows local users to exploit a race condition to replace a world-writable file in /tmp/NetClient and cause another user to execute arbitrary code when attempting to execute this client, as demonstrated by replacing /tmp/NetClient/client.

Unspecified vulnerability in Nortel CallPilot 4.x Server has unknown impact and attack vectors, aka P-2006-0011-GLOBAL.

tunnelform.yaws in Nortel SSL VPN 4.2.1.6 allows remote attackers to execute arbitrary commands via a link in the a parameter, which is executed with extra privileges in a cryptographically signed Java Applet.

Nortel Contivity VPN Client V05_01.030, when configuring a certificate to be used as authentication, does not properly drop system privileges, which allows local users to gain privileges by opening a program with the File Open dialog box.

Multiple TCP implementations with Protection Against Wrapped Sequence Numbers (PAWS) with the timestamps option enabled allow remote attackers to cause a denial of service (connection loss) via a spoofed packet with a large timer value, which causes the host to discard later packets because they appear to be too old.

Nortel VPN Router (aka Contivity) allows remote attackers to cause a denial of service (crash) via an IPsec IKE packet with a malformed ISAKMP header.