IBM AIX 3.2/4.1/4.2 DNS Hostname gethostbyname memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability was found in IBM AIX 3.2/4.1/4.2 (Operating System). It has been declared as very critical. This vulnerability affects the function gethostbyname of the component DNS Hostname Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered . The weakness was released 12/10/1996 as H-13 as not defined advisory (CIAC). The advisory is available at This vulnerability was named CVE-1999-0101. 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 06/12/2019). It is expected to see the exploit prices for this product decreasing in the near future.

A public exploit has been developed in Shell File. It is declared as proof-of-concept. It is possible to download the exploit at The vulnerability was handled as a non-public zero-day exploit for at least 1805 days. During that time the estimated underground price was around $5k-$25k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 6853), X-Force (637) and Vulnerability Center (SBV-9847).





CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍



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

NVD Base Score: 🔍


Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Exploit-DB: 🔍

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍


01/01/1992 🔍
12/03/1996 +1798 days 🔍
12/03/1996 +0 days 🔍
12/10/1996 +7 days 🔍
12/10/1996 +0 days 🔍
12/06/2005 +3283 days 🔍
06/17/2014 +3115 days 🔍
08/11/2017 +1151 days 🔍
06/12/2019 +670 days 🔍



Advisory: H-13
Status: Not defined

CVE: CVE-1999-0101 (🔍)
SecurityFocus: 6853 - Multiple Vendor gethostbyname() Buffer Overflow Vulnerability
X-Force: 637
Vulnerability Center: 9847 - AIX ,Solaris \x26 Microsoft Buffer Overflow via gethostbyname, Critical
OSVDB: 7990 - Overflowing DNS IPv4 length allows attackers to gain access

scip Labs:


Created: 06/17/2014 05:59 PM
Updated: 06/12/2019 09:53 AM
Changes: (8) vulnerability_discoverydate exploit_availability exploit_publicity exploit_url source_osvdb source_osvdb_title source_securityfocus_date source_securityfocus_class
Complete: 🔍


No comments yet. Please log in to comment.

Do you want to use VulDB in your project?

Use the official API to access entries easily!