Vulnerabilities > CVE-2008-4762 - Buffer Errors vulnerability in Freesshd 1.2.1
Attack vector
NETWORK Attack complexity
LOW Privileges required
SINGLE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
Stack-based buffer overflow in freeSSHd 1.2.1 allows remote authenticated users to cause a denial of service (service crash) and potentially execute arbitrary code via a long argument to the (1) rename and (2) realpath parameters.
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 freeSSHd 1.2.1 sftp realpath Remote Buffer Overflow PoC (auth). CVE-2008-4762. Dos exploit for windows platform file exploits/windows/dos/6812.pl id EDB-ID:6812 last seen 2016-02-01 modified 2008-10-22 platform windows port published 2008-10-22 reporter Jeremy Brown source https://www.exploit-db.com/download/6812/ title freeSSHd 1.2.1 sftp realpath Remote Buffer Overflow PoC auth type dos description freeSSHd 1.2.1 sftp rename Remote Buffer Overflow PoC (auth). CVE-2008-4762. Dos exploit for windows platform file exploits/windows/dos/6800.pl id EDB-ID:6800 last seen 2016-02-01 modified 2008-10-22 platform windows port published 2008-10-22 reporter Jeremy Brown source https://www.exploit-db.com/download/6800/ title freeSSHd 1.2.1 sftp rename Remote Buffer Overflow PoC auth type dos
References
- http://secunia.com/advisories/32366
- http://securityreason.com/securityalert/4515
- http://www.securityfocus.com/archive/1/497746/100/0/threaded
- http://www.securityfocus.com/bid/31872
- http://www.securitytracker.com/id?1021096
- http://www.vupen.com/english/advisories/2008/2897
- https://exchange.xforce.ibmcloud.com/vulnerabilities/46046
- https://www.exploit-db.com/exploits/6800
- https://www.exploit-db.com/exploits/6812