cbcvebase.
CVE-2007-1675
published 2007-03-28

CVE-2007-1675: Buffer overflow in the CRAM-MD5 authentication mechanism in the IMAP server (nimap.exe) in IBM Lotus Domino before 6.5.6 and 7.x before 7.0.2 FP1 allows remote…

PriorityP274critical10CVSS 2.0
AVNACLAuNCCICAC
ITWEXPLOITVulnCheck KEV
Exploited in the wild
EPSS
61.22%
99.1th percentile
Buffer overflow in the CRAM-MD5 authentication mechanism in the IMAP server (nimap.exe) in IBM Lotus Domino before 6.5.6 and 7.x before 7.0.2 FP1 allows remote attackers to cause a denial of service via a long username.

Affected

9 ranges
VendorProductVersion rangeFixed in
ibmlotus_domino
ibmlotus_domino
ibmlotus_domino
ibmlotus_domino
ibmlotus_domino
ibmlotus_domino
ibmlotus_domino
ibmlotus_domino
ibmlotus_domino

Detection & IOCsextracted from sources · hover to see the quote

port143
commanda001 authenticate cram-md5
other0x7765ebc0
bytes
\x54\x30\x30\x57\x54\x30\x30\x57
bytes
\x54\x30\x30\x57\x54\x30\x30\x57
bytes
\xb8\x54\x30\x30\x57\x8b\xfa\xaf\x75\xea\xaf\x75\xe7\xff\xe7
  • Exploit sends multiple 'a001 admin <shellcode>' IMAP commands before triggering the overflow, placing shellcode into memory via the admin command prior to the CRAM-MD5 authentication step (egghunter technique); detect repeated large IMAP 'admin' commands from the same source.
  • The exploit egg tag bytes 0x54 0x30 0x30 0x57 (repeated twice: T00W T00W) are embedded in shellcode as an egghunter marker; scan IMAP traffic for this byte sequence.
  • The overflow is triggered in the CRAM-MD5 authentication path; the base64-encoded AUTHENTICATE response containing NOP sleds (0x90 repeated) followed by shellcode is the attack vector — detect large base64 blobs in IMAP AUTHENTICATE responses.

CVSS provenance

nvdv2.010.0CRITICALAV:N/AC:L/Au:N/C:C/I:C/A:C
vulncheck10.0CRITICAL
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