FreeBSD up to ppp HOME 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, which was classified as critical, was found in FreeBSD up to (Operating System). This affects an unknown functionality of the component ppp. The manipulation of the argument HOME as part of a Environment Variable leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The software 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

buffer overflow in ppp program in freebsd 2.1 and earlier allows local users to gain privileges via a long home environment variable.

The weakness was released 12/19/1996 as FreeBSD-SA-96:20 as not defined advisory (Website). It is possible to read the advisory at This vulnerability is uniquely identified as CVE-1999-1385. The exploitability is told to be easy. Attacking locally is a requirement. No form of authentication is needed for exploitation. Technical details and a exploit are known.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. The exploit is shared for download at We expect the 0-day to have been worth approximately $5k-$25k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (7465) and Vulnerability Center (SBV-23331).





  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 9.3
VulDB Meta Temp Score: 8.4

VulDB Base Score: 9.3
VulDB Temp Score: 8.4
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: Yes
Remote: No

Availability: 🔍
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍


12/16/1996 🔍
12/19/1996 +3 days 🔍
12/19/1996 +0 days 🔍
12/19/1996 +0 days 🔍
04/09/2004 +2667 days 🔍
08/31/2009 +1970 days 🔍
06/17/2014 +1751 days 🔍
02/13/2017 +972 days 🔍



Advisory: FreeBSD-SA-96:20
Status: Not defined

CVE: CVE-1999-1385 (🔍)
X-Force: 7465
Vulnerability Center: 23331 - FreeBSD <= 2.1 PPP HOME Environment Variable Local Privileges Escalation Vulnerability, High
OSVDB: 6085 - FreeBSD ppp HOME Environment Local Overflow


Created: 06/17/2014 06:04 PM
Updated: 02/13/2017 10:33 AM
Changes: 06/17/2014 06:04 PM (54), 02/13/2017 10:33 AM (9)
Complete: 🔍


No comments yet. Languages: en.

Please log in to comment.

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!