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Fencer Vulns
critical 10.0

CVE-2009-3699 in the critical feed json

Stack-based buffer overflow in libcsa.a (aka the calendar daemon library) in IBM AIX 5.x through 5.3.10 and 6.x through 6.1.3, and VIOS 2.1…

published 2009-10-15 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3672

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
62.3%
EPSS 62.3% chance of exploitation in 30 days, percentile 99.1%
public exploits
2
Metasploit, Exploit-DB

Summary

Stack-based buffer overflow in libcsa.a (aka the calendar daemon library) in IBM AIX 5.x through 5.3.10 and 6.x through 6.1.3, and VIOS 2.1 and earlier, allows remote attackers to execute arbitrary code via a long XDR string in the first argument to procedure 21 of rpc.cmsd.

Patch / fix

Timeline

  1. First public exploit (Metasploit exploit/aix/rpc_cmsd_opcode21)
  2. Published

Exploit prediction

62.34% chance of exploitation in the next 30 days, higher than 99.1% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/aix/rpc_cmsd_opcode21 AIX Calendar Manager Service Daemon (rpc.cmsd) Opcode 21 Buffer Overflow metasploit exploit, great rank, 2009-10-07
  • EDB-16929 AIX Calendar Manager Service Daemon (rpc.cmsd) Opcode 21 - Buffer Overflow (Metasploit) dos, 2010-11-11
  • securityfocus.com http://www.securityfocus.com/bid/36615 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.