CVE-2009-3699

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…

published October 15, 2009

Patch now

High probability of exploitation

NVD has not assigned a CVSS score to this record. It sits in the 99.2th percentile for exploit probability.

CVSS
—
EPSS
62%
Percentile
99.2
In the wild
Unconfirmed
What it is

⚠️ A single lengthy XDR string can set off a stack-based buffer overflow in IBM AIX's calendar daemon library! Think of it like a kitchen that overflows with one too many ingredients — if the chef isn't careful with portion sizes, the entire dish could spill over and create a mess. That's exactly what happens here when the input isn't properly handled! An attacker could potentially execute arbitrary code on the system, leading to unauthorized access or control. This isn't a complete disaster, but it opens the door to future attacks, which is concerning for system integrity.

Put simply

Think of it like a kitchen that overflows with one too many ingredients — if the chef isn't careful with portion sizes, the entire dish could spill over and create a mess. That's exactly what happens here when the input isn't properly handled! The vulnerability in libcsa.a allows for a stack-based buffer overflow triggered by an overly long XDR string passed to procedure 21 of rpc.cmsd. This unchecked input could allow attackers to manipulate the stack and run malicious code.

What to do

An attacker could potentially execute arbitrary code on the system, leading to unauthorized access or control. This isn't a complete disaster, but it opens the door to future attacks, which is concerning for system integrity. To mitigate this vulnerability, ensure AIX is updated to version 5.3.10 or 6.1.3 or later, based on your installation. Additionally, it’s wise to restrict access to the rpc.cmsd service and monitor for any unusual activity. You've got this! Follow these steps to lock down your system and keep those pesky attackers at bay! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.62345 · 99.2th percentile
Published
2009-10-15T10:00Z
EPSS history
Timeline
  • 15 OCT 10:00Z
    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…
    cvelistv5