cbcvebase.
CVE-2008-2499
published 2008-05-29

CVE-2008-2499: Stack-based buffer overflow in the Community Services Multiplexer (aka MUX or StMux.exe) in IBM Lotus Sametime 7.5.1 CF1 and earlier, and 8.x before 8.0.1…

PriorityP264high7.5CVSS 2.0
AVNACLAuNCPIPAP
EXPLOIT
EPSS
77.47%
99.5th percentile
Stack-based buffer overflow in the Community Services Multiplexer (aka MUX or StMux.exe) in IBM Lotus Sametime 7.5.1 CF1 and earlier, and 8.x before 8.0.1, allows remote attackers to execute arbitrary code via a crafted URL.

Affected

3 ranges
VendorProductVersion rangeFixed in
ibmlotus_sametime<= 7.5
ibmlotus_sametime
ibmlotus_sametime>= 8.0 < 8.0.18.0.1

Detection & IOCsextracted from sources · hover to see the quote

filenameSTMux.exe
port1533
url/CommunityCBR
url/CommunityCBR/CC.39.<payload>/
uaSametime Community Agent
registry0x7c3410c2
port4444
commandPOST /CommunityCBR/CC.39.<path>/ HTTP with User-Agent: Sametime Community Agent
bytes
\x74\x23\x75\x21
bytes
\xff\x24\x24
  • Detect exploit attempts by monitoring for HTTP POST requests to the path pattern /CommunityCBR/CC.39.* on TCP port 1533 with the User-Agent 'Sametime Community Agent'.
  • The exploit overwrites the SEH chain; look for the ROP gadget return address 0x7c3410c2 (pop ecx/pop ecx/ret from msvcr71.dll) appearing in network traffic on port 1533.
  • The exploit payload contains the JE/JNZ short-jump byte sequence 0x74 0x23 0x75 0x21 embedded in the URL path; this can be used as a network signature.
  • Monitor STMux.exe (the Sametime Community Services Multiplexer) for abnormal process behaviour or crashes, as it is the vulnerable component listening on TCP 1533.
  • A successful exploit may result in a bind shell on TCP port 4444 on the victim host; monitor for unexpected listening services on that port after STMux.exe activity.
  • ·Bad characters for the payload are \x00, \x0a, and \x0d — these bytes cannot appear in the exploit path or shellcode, which constrains shellcode selection.
  • ·The EXITFUNC is set to 'seh', meaning the shellcode exits via the SEH chain rather than process or thread exit; this affects post-exploitation stability.
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