The Notes Remote Procedure Call (NRPC) protocol in IBM Lotus Notes Domino before 6.5.5 FP2 and 7.x before 7.0.2 does not require authentication to perform user lookups, which allows remote attackers to obtain the user ID file.

IBM Lotus Notes 6.0, 6.5, and 7.0 does not properly handle replies to e-mail messages with alternate name users when the (1) "Save As Draft" option is used or (2) a "," (comma) is inside the "phrase" portion of an address, which can cause the e-mail to be sent to users that were deleted from the To, CC, and BCC fields, which allows remote attackers to obtain the list of original recipients.

The "Add Sender to Address Book" operation (AddSenderToAddressBook.lss) and NameHelper.lss in IBM Lotus Notes 6.0 and 6.5 before 20060331 do not properly store information in the Personal Address Book when multiple messages are checked and a message uses AltFrom, which might allow user-assisted remote attackers to trick a user into sending e-mail to an unauthorized recipient.

Unspecified vulnerability in IBM Lotus Notes and Domino Server before 6.5.5, when running on AIX, allows attackers to cause a denial of service (deep recursion leading to stack overflow and crash) via long formulas.

Multiple unspecified vulnerabilities in IBM Lotus Notes and Domino Server before 6.5.5 allow attackers to cause a denial of service (application crash) via multiple vectors, involving (1) a malformed message sent to an "Out Of Office" agent (SPR LPEE6DMQWJ), (2) the compact command (RTIN5U2SAJ), (3) malformed bitmap images (MYAA6FH5HW), (4) the "Delete Attachment" action (YPHG6844LD), (5) parsing certificates from a remote Certificate Table (AELE6DZFJW), and (6) creating a SSL key ring with the Domino Administration client (NSUA4FQPTN).

Multiple memory leaks in IBM Lotus Notes and Domino Server before 6.5.5 allow attackers to cause a denial of service (memory consumption and crash) via unknown vectors related to (1) unspecified vectors during the SSL handshake (SPR# MKIN67MQVW), (2) the stash file during the SSL handshake (SPR# MKIN693QUT), and possibly other vectors. NOTE: due to insufficient information in the original vendor advisory, it is not clear whether there is an attacker role in other memory leaks that are specified in the advisory.

Buffer overflow in IBM Lotus Notes and Domino Server before 6.5.5 allows attackers to cause a denial of service (router crash or hang) via unspecified vectors involving "CD to MIME Conversion".

Multiple unspecified vulnerabilities in IBM Lotus Notes and Domino Server before 6.5.5 have unknown impact and attack vectors, due to "potential security issues" as identified by SPR numbers (1) GPKS6C9J67 in Agents, (2) JGAN6B6TZ3 and (3) KSPR699NBP in the Router, (4) GPKS5YQGPT in Security, or (5) HSAO6BNL6Y in the Web Server. NOTE: vector 3 is related to an issue in NROUTER in IBM Lotus Notes and Domino Server before 6.5.4 FP1, 6.5.5, and 7.0, which allows remote attackers to cause a denial of service (CPU consumption) via a crafted vCal meeting request sent via SMTP (aka SPR# KSPR699NBP).

Multiple stack-based buffer overflows in Autonomy (formerly Verity) KeyView SDK before 9.2.0, as used in Lotus Notes 6.5.4 and 7.0, allow remote attackers to execute arbitrary code via (1) a UUE file containing an encoded file with a long filename handled by uudrdr.dll, (2) a compressed ZIP file with a long filename handled by kvarcve.dll, (3) a TAR archive with a long filename that is extracted to a directory with a long path handled by the TAR reader (tarrdr.dll), (4) an email that contains a long HTTP, FTP, or // link handled by the HTML speed reader (htmsr.dll) or (5) an email containing a crafted long link handled by the HTML speed reader (htmsr.dll).

IBM Lotus Notes 6.5.4 and 6.5.5, and 7.0.0 and 7.0.1, uses insecure default permissions (Everyone/Full Control) for the "Notes" folder and all children, which allows local users to gain privileges and modify, add, or delete files in that folder.