发布时间 :2003-12-31 00:00:00
修订时间 :2016-10-17 22:39:22

[原文]The Cisco LEAP challenge/response authentication mechanism uses passwords in a way that is susceptible to dictionary attacks, which makes it easier for remote attackers to gain privileges via brute force password guessing attacks.

[CNNVD]Cisco LEAP密码泄露漏洞(CNNVD-200312-100)

        Cisco LEAP challenge/response认证机制以一种易受字典式攻击的方法使用密码。远程攻击者更容易借助强力密码猜测攻击提升特权。

- CVSS (基础分值)

CVSS分值: 10 [严重(HIGH)]
机密性影响: [--]
完整性影响: [--]
可用性影响: [--]
攻击复杂度: [--]
攻击向量: [--]
身份认证: [--]

- CPE (受影响的平台与产品)


- OVAL (用于检测的技术细节)


- 官方数据库链接
(官方数据源) MITRE
(官方数据源) NVD
(官方数据源) CNNVD

- 其它链接及资源
(UNKNOWN)  BUGTRAQ  20040407 Release of Cisco Attack tool Asleap
(VENDOR_ADVISORY)  CISCO  20030803 Dictionary Attack on Cisco LEAP Vulnerability
(UNKNOWN)  BUGTRAQ  20031003 Dictionary attack against Cisco's LEAP, Wireless LANs vulnerable
(UNKNOWN)  BUGTRAQ  20031006 Weaknesses in LEAP Challenge/Response
(UNKNOWN)  BID  8755
(UNKNOWN)  XF  cisco-leap-dictionary(12804)

- 漏洞信息

Cisco LEAP密码泄露漏洞
危急 设计错误
2003-12-31 00:00:00 2005-10-20 00:00:00
        Cisco LEAP challenge/response认证机制以一种易受字典式攻击的方法使用密码。远程攻击者更容易借助强力密码猜测攻击提升特权。

- 公告与补丁

        Cisco has announced the EAP-FAST protocol as a secure replacement for LEAP. Users are advised to migrate to this or other protocols such as PEAP or EAP-TLS. More information can be found in the referenced vendor advisory (Dictionary Attack on Cisco LEAP Vulnerability).

- 漏洞信息 (23212)

Cisco LEAP Password Disclosure Weakness (EDBID:23212)
hardware remote
2003-10-03 Verified
0 Cisco Security
N/A [点击下载]

It has been reported that Cisco LEAP (Lightweight Extensible
Authentication Protocol) is prone to a password disclosure weakness that may allow a remote user to steal user passwords. The issue may be exploited out by brute forcing user passwords using dictionary attacks.

Successful exploitation of this weakness may allow a remote attacker to steal authentication information, potentially allowing for unauthorized network access.		

- 漏洞信息

Cisco LEAP Challenge/Response Authentication Weakness
Remote / Network Access Authentication Management
Loss of Confidentiality
Exploit Public

- 漏洞描述

Cisco LEAP contains a flaw that may allow a malicious user to recover user accounts and passwords. Cisco LEAP is a modified implementation of MS-CHAPv2, which is vulnerable to dictionary attacks. It is possible that the flaw may allow offline brute force recovery of usernames and passwords resulting in a loss of confidentiality.

- 时间线

2003-08-02 Unknow
2004-04-06 Unknow

- 解决方案

Currently, there are no known upgrades, patches, or workarounds available to correct this issue.

- 相关参考

- 漏洞作者