IBM AIX up to 6.1.3 rpc.cmsd first memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in IBM AIX. This impacts an unknown function of the file rpc.cmsd. This manipulation of the argument first causes memory corruption. This vulnerability is registered as CVE-2009-3699. Furthermore, an exploit is available.

Detailsinfo

A vulnerability classified as very critical was found in IBM AIX (Operating System). Affected by this vulnerability is some unknown processing of the file rpc.cmsd. The manipulation of the argument first with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The issue has been introduced in 05/04/2001. The weakness was published 10/07/2009 by Rodrigo Rubira Branco (iDefense) with iDEFENSE Labs (Website). It is possible to read the advisory at vupen.com. This vulnerability is known as CVE-2009-3699. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/14/2025). It is expected to see the exploit prices for this product decreasing in the near future.

A public exploit has been developed in ANSI C and been published 5 months after the advisory. It is possible to download the exploit at securityfocus.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 3078 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 64350 (AIX 6.1 TL 1 : cmsd (IZ62570)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family AIX Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 116627 (IBM AIX rpc.cmsd remote buffer overflow vulnerability).

A possible mitigation has been published immediately after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 1907. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 9753.

The vulnerability is also documented in the databases at X-Force (53681), Exploit-DB (16929), Tenable (64350), SecurityFocus (BID 36615†) and OSVDB (58726†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.6

VulDB Base Score: 10.0
VulDB Temp Score: 9.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 64350
Nessus Name: AIX 6.1 TL 1 : cmsd (IZ62570)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: rpc_cmsd_opcode21.rb
MetaSploit Name: AIX Calendar Manager Service Daemon (rpc.cmsd) Opcode 21 Buffer Overflow
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍
Snort ID: 1907
Snort Message: PROTOCOL-RPC CMSD UDP CMSD_CREATE buffer overflow attempt
Snort Class: 🔍
TippingPoint: 🔍
SourceFire IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

05/04/2001 🔍
10/07/2009 +3078 days 🔍
10/07/2009 +0 days 🔍
10/07/2009 +0 days 🔍
10/07/2009 +0 days 🔍
10/08/2009 +1 days 🔍
10/10/2009 +2 days 🔍
10/14/2009 +3 days 🔍
10/15/2009 +1 days 🔍
01/28/2010 +105 days 🔍
01/30/2013 +1098 days 🔍
03/18/2015 +777 days 🔍
05/14/2025 +3710 days 🔍

Sourcesinfo

Vendor: ibm.com

Advisory: vupen.com⛔
Researcher: Rodrigo Rubira Branco (iDefense)
Organization: iDEFENSE Labs
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-3699 (🔍)
GCVE (CVE): GCVE-0-2009-3699
GCVE (VulDB): GCVE-100-50455
X-Force: 53681
SecurityFocus: 36615 - IBM AIX 'rpc.cmsd' Calendar Daemon Remote Stack Buffer Overflow Vulnerability
Secunia: 36978
OSVDB: 58726 - IBM AIX libcsa.a Calendar Manager Service Daemon (rpc.cmsd) Remote Procedure 21 Overflow
SecurityTracker: 1022996
Vulnerability Center: 23643 - IBM AIX \x27rpc.cmsd\x27 Calendar Daemon Remote Arbitrary Code Execution and DoS Vulnerability, High

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/18/2015 15:15
Updated: 05/14/2025 18:11
Changes: 03/18/2015 15:15 (77), 02/15/2017 09:28 (13), 08/24/2021 00:45 (3), 08/24/2021 00:55 (1), 06/04/2024 21:43 (16), 11/29/2024 19:24 (5), 02/15/2025 20:19 (3), 05/14/2025 18:11 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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