Oracle Database Server AUTH_SESSKEY Remote Code Execution

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as very critical was found in Oracle Database Server (Database Software). This vulnerability affects an unknown function. The manipulation of the argument AUTH_SESSKEY with an unknown input leads to a remote code execution vulnerability. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Unspecified vulnerability in the Network Authentication component in Oracle Database and allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors. NOTE: the previous information was obtained from the October 2009 CPU. Oracle has not commented on claims from an independent researcher that this is related to improper validation of the AUTH_SESSKEY parameter length that leads to arbitrary code execution.

The weakness was shared 10/21/2009 by Dennis Yurichev with Oracle (Website). The advisory is available at This vulnerability was named CVE-2009-1979. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/24/2021).

A public exploit has been developed by Dennis Yurichev in C++ and been published 2 weeks after the advisory. It is possible to download the exploit at It is declared as highly functional. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 56066 (Oracle Database Multiple Vulnerabilities (October 2009 CPU)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Databases. The commercial vulnerability scanner Qualys is able to test this issue with plugin 19575 (Oracle Database October 2009 Patch Set Update (PSU) Not Installed (Patch 8833280)).

A possible mitigation has been published even before and not after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 9414.

The vulnerability is also documented in the databases at Tenable (56066) and Exploit-DB (9905). The entries 50583, 50582, 50581 and 50580 are related to this item.






  • commercial

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.8

VulDB Base Score: 9.8
VulDB Temp Score: 9.8
VulDB Vector: 🔍
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Class: Remote Code Execution
CWE: Unknown
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: Dennis Yurichev
Programming Language: 🔍
Download: 🔍

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Current Price Estimation: 🔍


Nessus ID: 56066
Nessus Name: Oracle Database Multiple Vulnerabilities (October 2009 CPU)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: tns_auth_sesskey.rb
MetaSploit Name: Oracle 10gR2 TNS Listener AUTH_SESSKEY Buffer Overflow
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
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TippingPoint: 🔍

McAfee IPS: 🔍
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PaloAlto IPS: 🔍
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06/08/2009 🔍
10/20/2009 +134 days 🔍
10/20/2009 +0 days 🔍
10/21/2009 +1 days 🔍
10/21/2009 +0 days 🔍
10/21/2009 +0 days 🔍
10/21/2009 +0 days 🔍
10/22/2009 +0 days 🔍
10/30/2009 +8 days 🔍
10/30/2009 +0 days 🔍
03/18/2015 +1965 days 🔍
08/24/2021 +2351 days 🔍



Researcher: Dennis Yurichev
Organization: Oracle
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-1979 (🔍)
Vulnerability Center: 23823 - [cpuoct2009-096303] Oracle Database Network Authentication Vulnerability, Critical
SecurityFocus: 36747 - Oracle Network Authentication CVE-2009-1979 Remote Buffer Overflow Vulnerability
OSVDB: 59110 - Oracle Database Network Authentication AUTH_SESSKEY Parameter Remote Overflow

scip Labs:
See also: 🔍


Created: 03/18/2015 03:15 PM
Updated: 08/24/2021 12:15 PM
Changes: 03/18/2015 03:15 PM (67), 04/07/2017 05:06 PM (17), 08/24/2021 12:07 PM (3), 08/24/2021 12:15 PM (1)
Complete: 🔍


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