BSD Libc up to 10.2.6 realpath off-by-one

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in BSD Libc. It has been declared as critical. This vulnerability affects the function realpath. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-193. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 07/31/2003 by Wojciech Purczynski and Janusz Niewiadomski with (Website). The advisory is available at This vulnerability was named CVE-2003-0466. 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.

A public exploit has been developed in Perl and been published 2 weeks after the advisory. It is declared as proof-of-concept. It is possible to download the exploit at The vulnerability scanner Nessus provides a plugin with the ID 16907 (HP-UX PHNE_29462 : s700_800 11.22 ftpd(1M) and ftp(1) patch), which helps to determine the existence of the flaw in a target environment. It is assigned to the family HP-UX Local Security Checks.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Attack attempts may be identified with Snort ID 2389.

The vulnerability is also documented in the databases at SecurityFocus (BID 8315), X-Force (12785), Secunia (SA9535) and Tenable (16907). The entries 217 and 218 are pretty similar.




CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.3
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
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Class: Memory corruption
CWE: CWE-193
ATT&CK: Unknown

Local: No
Remote: Yes

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

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 16907
Nessus Name: HP-UX PHNE_29462 : s700_800 11.22 ftpd(1M) and ftp(1) patch
Nessus File: 🔍
Nessus Family: 🔍

OpenVAS ID: 53646
OpenVAS Name: Debian Security Advisory DSA 357-1 (wu-ftpd)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfoedit

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Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍
Snort ID: 2389
Snort Message: PROTOCOL-FTP RNTO overflow attempt
Snort Class: 🔍

Suricata ID: 2102391
Suricata Class: 🔍
Suricata Message: 🔍


07/31/2003 🔍
07/31/2003 +0 days 🔍
08/14/2003 +14 days 🔍
08/27/2003 +12 days 🔍
06/04/2004 +282 days 🔍
04/11/2016 +4328 days 🔍
02/15/2019 +1040 days 🔍


Researcher: Wojciech Purczynski/Janusz Niewiadomski
Status: Not defined

CVE: CVE-2003-0466 (🔍)

SecurityFocus: 8315 - Multiple Vendor C Library realpath() Off-By-One Buffer Overflow Vulnerability
Secunia: 9535
X-Force: 12785
OSVDB: 6602 - Multiple BSD libc realpath() Off-by-one Overflow

scip Labs:
See also: 🔍


Created: 04/11/2016 10:41 PM
Updated: 02/15/2019 01:53 PM
Changes: (11) advisory_url advisory_company_name exploit_publicity exploit_url source_cve source_secunia source_securityfocus source_securityfocus_date source_securityfocus_class source_xforce source_snort_id
Complete: 🔍


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