Vulnerabilities > CVE-2009-4873 - Buffer Errors vulnerability in Rhinosoft Serv-U 9.0.0.5
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
Stack-based buffer overflow in the HTTP server in Rhino Software Serv-U Web Client 9.0.0.5 allows remote attackers to cause a denial of service (server crash) or execute arbitrary code via a long Session cookie.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
Exploit-Db
description Serv-u web client 9.0.0.5 buffer overflow. CVE-2009-4873. Remote exploit for windows platform id EDB-ID:9966 last seen 2016-02-01 modified 2009-11-02 published 2009-11-02 reporter Nikolas Rangos source https://www.exploit-db.com/download/9966/ title Serv-u Web client 9.0.0.5 - Buffer Overflow description Serv-u web client 9.0.0.5 buffer overflow. CVE-2009-4873. Remote exploit for windows platform id EDB-ID:9800 last seen 2016-02-01 modified 2009-11-05 published 2009-11-05 reporter Megumi Yanagishita source https://www.exploit-db.com/download/9800/ title Serv-u Web client 9.0.0.5 - Buffer Overflow
Nessus
| NASL family | FTP |
| NASL id | SERVU_9_1_0_0.NASL |
| description | According to its banner, the installed version of Serv-U is earlier than 9.1.0.0, and therefore affected by the following issues : - A boundary error in the web administration interface when parsing session cookies can result in a stack-based buffer overflow. (CVE-2009-4873) - A boundary error in the TEA decoding algorithm can result in a stack-based buffer overflow when processing a long hexadecimal string. (CVE-2009-4006) |
| last seen | 2020-06-01 |
| modified | 2020-06-02 |
| plugin id | 42934 |
| published | 2009-11-30 |
| reporter | This script is Copyright (C) 2009-2018 Tenable Network Security, Inc. |
| source | https://www.tenable.com/plugins/nessus/42934 |
| title | Serv-U < 9.1.0.0 |
| code | |
Saint
| bid | 36895 |
| description | Serv-U Web Client session cookie handling buffer overflow |
| osvdb | 59772 |
| title | serv_u_web_client_cookie |
| type | remote |