ID CVE-2002-1357
Summary Multiple SSH2 servers and clients do not properly handle packets or data elements with incorrect length specifiers, which may allow remote attackers to cause a denial of service or possibly execute arbitrary code, as demonstrated by the SSHredder SSH protocol test suite.
Vulnerable Configurations
  • Cisco IOS 12.0S
  • Cisco IOS 12.0ST
  • Cisco IOS 12.1E
  • Cisco IOS 12.1EA
  • Cisco IOS 12.1T
  • Cisco IOS 12.2
  • Cisco IOS 12.2S
  • Cisco IOS 12.2T
  • cpe:2.3:a:fissh:ssh_client:1.0a_for_windows
  • cpe:2.3:a:intersoft:securenetterm:5.4.1
  • cpe:2.3:a:netcomposite:shellguard_ssh:3.4.6
  • cpe:2.3:a:pragma_systems:secureshell:2.0
  • PuTTY 0.48
  • PuTTY 0.49
  • PuTTY 0.53
  • cpe:2.3:a:winscp:winscp:2.0.0
Base: 10.0 (as of 01-01-2004 - 00:00)
  • 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.
  • Overflow Binary Resource File
    An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the attacker access to the execution stack and execute arbitrary code in the target process. This attack pattern is a variant of standard buffer overflow attacks using an unexpected vector (binary files) to wrap its attack and open up a new attack vector. The attacker is required to either directly serve the binary content to the victim, or place it in a locale like a MP3 sharing application, for the victim to download. The attacker then is notified upon the download or otherwise locates the vulnerability opened up by the buffer overflow.
  • Buffer Overflow via Symbolic Links
    This type of attack leverages the use of symbolic links to cause buffer overflows. An attacker can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.
  • Overflow Variables and Tags
    This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The attacker crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.
  • Buffer Overflow via Parameter Expansion
    In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
  • Buffer Overflow in an API Call
    This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An attacker who has access to an API may try to embed malicious code in the API function call and exploit a buffer overflow vulnerability in the function's implementation. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process.
  • Buffer Overflow in Local Command-Line Utilities
    This attack targets command-line utilities available in a number of shells. An attacker can leverage a vulnerability found in a command-line utility to escalate privilege to root.
nessus via4
  • NASL family CISCO
    description Certain Cisco products containing support for the Secure Shell (SSH) server are vulnerable to a Denial of Service (DoS) if the SSH server is enabled on the device. A malformed SSH packet directed at the affected device can cause a reload of the device. No authentication is necessary for the packet to be received by the affected device. The SSH server in Cisco IOS is disabled by default. Cisco will be making free software available to correct the problem as soon as possible. The malformed packets can be generated using the SSHredder test suite from Rapid7, Inc. Workarounds are available. The Cisco PSIRT is not aware of any malicious exploitation of this vulnerability.
    last seen 2019-02-21
    modified 2018-11-15
    plugin id 48968
    published 2010-09-01
    reporter Tenable
    title SSH Malformed Packet Vulnerabilities - Cisco Systems
  • NASL family CISCO
    NASL id CSCDZ60229.NASL
    description It is possible to make the remote IOS crash when sending it malformed SSH packets during the key exchange. These flaws are documented as CISCO bug ID CSCdz60229, CSCdy87221 and CSCdu75477.
    last seen 2019-02-21
    modified 2018-06-27
    plugin id 11383
    published 2003-03-14
    reporter Tenable
    title Cisco SSH2 Server/Client Malformed Packet Remote DoS (CSCdz60229, CSCdy87221, CSCdu75477)
  • NASL family Misc.
    description According to its banner, the remote SSH server is affected by one or more of the following vulnerabilities : - CVE-2002-1357 (incorrect length) - CVE-2002-1358 (lists with empty elements/empty strings) - CVE-2002-1359 (large packets and large fields) - CVE-2002-1360 (string fields with zeros) The impact of successful exploitation of these vulnerabilities varies across products. In some cases, remote attackers will be able to execute arbitrary code with the privileges of the SSH process (usually root), although for the products currently tested, the maximum impact is believed to be just a denial of service.
    last seen 2019-02-21
    modified 2018-11-15
    plugin id 11195
    published 2002-12-20
    reporter Tenable
    title SSH Multiple Remote Vulnerabilities
oval via4
accepted 2014-06-09T04:01:43.813-04:00
class vulnerability
  • name Yuzheng Zhou
    organization Hewlett-Packard
  • name Jerome Athias
    organization McAfee, Inc.
description Multiple SSH2 servers and clients do not properly handle packets or data elements with incorrect length specifiers, which may allow remote attackers to cause a denial of service or possibly execute arbitrary code, as demonstrated by the SSHredder SSH protocol test suite.
family ios
id oval:org.mitre.oval:def:5849
status accepted
submitted 2008-05-02T11:06:36.000-04:00
title Multiple Vendors SSH2 "incorrect length fields" Vulnerability
version 5
refmap via4
bid 6405
cert CA-2002-36
cert-vn VU#389665
  • 1005812
  • 1005813
vulnwatch 20021216 R7-0009: Vulnerabilities in SSH2 Implementations from Multiple Vendors
xf ssh-transport-length-bo(10868)
Last major update 04-03-2009 - 00:14
Published 23-12-2002 - 00:00
Last modified 10-10-2017 - 21:29
Back to Top