CVE-2002-1017
CVSS2.1
发布时间 :2002-10-04 00:00:00
修订时间 :2008-09-05 16:29:33
NMCOS    

[原文]Adobe eBook Reader 2.1 and 2.2 allows a user to copy eBooks to other systems by using the backup feature, capturing the encryption Challenge, and using the appropriate hash function to generate the activation code.


[CNNVD]Adobe eBook Reader文件传送授权凭证弱算法漏洞(CNNVD-200210-123)

        
        Adobe eBook Reader是一款可以阅读Adobe eBooks的客户端应用程序,Adobe Content Server是一款安全的在线销售电子书籍的产品,可提供对电子书籍内容进行保护,用户可以阅读书籍,但阅读的内容限制由发布者规定。可使用在Microsoft Windows和Macintosh OS 9操作系统下运行。
        Adobe eBook Reader授权凭证使用的算法不强壮,本地攻击者可以利用这个漏洞建立非法Adobe eBook拷贝,或者无需凭证交互任意访问Adobe eBook。
        客户从电子商务站点购买一Adobe PDF eBook,它自动下载到Acrobat eBook Reader库中,通过输入主凭证信息就可以查看eBook内容,默认情况下Adobe eBook Reader设置eBook不能传送到其他电脑上,每一份eBook拷贝需要唯一的加密密钥。不过 http://www.planetebook.com/mainpage.asp?webpageid=279 报告,Adobe eBook Reader存在漏洞,通过备份Adobe eBook Reader整个库就可以把eBook传送到另一电脑上进行阅读。
        在另一电脑上打开eBook的时候,用户会提示需要授权凭证,并提供挑战(challenge)字符串,但是用于挑战(challenge)/应答(response)中的加密机制设计存在缺陷,挑战(challenge)/应答(response)的计算使用了简单的加密算法,其基于存储在eBook Reader执行文件中的信息,熟悉加密算法的攻击者可以计算出正确应答(response)信息而无需凭证交互。
        

- CVSS (基础分值)

CVSS分值: 2.1 [轻微(LOW)]
机密性影响: NONE [对系统的机密性无影响]
完整性影响: PARTIAL [可能会导致系统文件被修改]
可用性影响: NONE [对系统可用性无影响]
攻击复杂度: LOW [漏洞利用没有访问限制 ]
攻击向量: LOCAL [漏洞利用需要具有物理访问权限或本地帐户]
身份认证: NONE [漏洞利用无需身份认证]

- CPE (受影响的平台与产品)

cpe:/a:adobe:digital_editions:9.2.1::mac_os_x
cpe:/a:adobe:digital_editions:9.2.2::mac_os_x
cpe:/a:adobe:digital_editions:2.1::win
cpe:/a:adobe:digital_editions:2.2::win

- OVAL (用于检测的技术细节)

未找到相关OVAL定义

- 官方数据库链接

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1017
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2002-1017
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-200210-123
(官方数据源) CNNVD

- 其它链接及资源

http://www.securityfocus.com/bid/5358
(VENDOR_ADVISORY)  BID  5358
http://www.iss.net/security_center/static/9740.php
(VENDOR_ADVISORY)  XF  adobe-ebook-bypass-activation(9740)
http://online.securityfocus.com/archive/1/285093
(UNKNOWN)  BUGTRAQ  20020730 Vulnerability: protected Adobe eBooks can be copied between computers

- 漏洞信息

Adobe eBook Reader文件传送授权凭证弱算法漏洞
低危 设计错误
2002-10-04 00:00:00 2005-10-20 00:00:00
本地  
        
        Adobe eBook Reader是一款可以阅读Adobe eBooks的客户端应用程序,Adobe Content Server是一款安全的在线销售电子书籍的产品,可提供对电子书籍内容进行保护,用户可以阅读书籍,但阅读的内容限制由发布者规定。可使用在Microsoft Windows和Macintosh OS 9操作系统下运行。
        Adobe eBook Reader授权凭证使用的算法不强壮,本地攻击者可以利用这个漏洞建立非法Adobe eBook拷贝,或者无需凭证交互任意访问Adobe eBook。
        客户从电子商务站点购买一Adobe PDF eBook,它自动下载到Acrobat eBook Reader库中,通过输入主凭证信息就可以查看eBook内容,默认情况下Adobe eBook Reader设置eBook不能传送到其他电脑上,每一份eBook拷贝需要唯一的加密密钥。不过 http://www.planetebook.com/mainpage.asp?webpageid=279 报告,Adobe eBook Reader存在漏洞,通过备份Adobe eBook Reader整个库就可以把eBook传送到另一电脑上进行阅读。
        在另一电脑上打开eBook的时候,用户会提示需要授权凭证,并提供挑战(challenge)字符串,但是用于挑战(challenge)/应答(response)中的加密机制设计存在缺陷,挑战(challenge)/应答(response)的计算使用了简单的加密算法,其基于存储在eBook Reader执行文件中的信息,熟悉加密算法的攻击者可以计算出正确应答(response)信息而无需凭证交互。
        

- 公告与补丁

        临时解决方法:
        如果您不能立刻安装补丁或者升级,CNNVD建议您采取以下措施以降低威胁:
        * 暂时没有合适的临时解决方法。
        厂商补丁:
        Adobe
        -----
        目前厂商还没有提供补丁或者升级程序,我们建议使用此软件的用户随时关注厂商的主页以获取最新版本:
        
        http://www.adobe.com/products/ebookreader/

- 漏洞信息

9297
Adobe eBook Reader Encryption Challenge Activation Bypass
Local Access Required Other
Loss of Integrity Solution Unknown

- 漏洞描述

eBook Reader contains a flaw that may allow a malicious user to bypass Digital Rights Management (DRM). The issue is triggered a user restores a backup from one computer on to another computer, which is supposed to be restricted. eBook Reader implements this restriction using a weak encryption algorithm, which could be exploited resulting in a loss of integrity.

- 时间线

2002-07-30 Unknow
Unknow 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

- 漏洞信息

Adobe eBook Reader File Transfer Authorization Voucher Weak Algorithm Vulnerability
Design Error 5358
No Yes
2002-07-30 12:00:00 2009-07-11 02:56:00
Published by ElcomSoft Co.Ltd. <info@elcomsoft.com>.

- 受影响的程序版本

Adobe eBook Reader for Windows 2.2
Adobe eBook Reader for Windows 2.1
Adobe eBook Reader for Mac OS 9 2.2
Adobe eBook Reader for Mac OS 9 2.1

- 漏洞讨论

Adobe eBook Reader is a client side application which is able to view Adobe eBooks, available for Microsoft Windows and Macintosh OS 9.

Reportedly, an eBook may be transferred to a different computer by backing up the book content and a number of datafiles. When the eBook is opened, however, the user will be prompted for a new authorization voucher, and given a challenge string.

It has been reported that the encryption scheme used for this challenge / response cycle is fundamentally flawed. Allegedly, both the challenge and response can be computed using commonly available cryptographic algorithms, based on secret information stored within the eBook Reader executable file.

A malicious user with details on the algorith may computer the correct response without vendor interaction.

- 漏洞利用

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: vuldb@securityfocus.com &lt;mailto:vuldb@securityfocus.com&gt;.

- 解决方案

Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: vuldb@securityfocus.com <mailto:vuldb@securityfocus.com>.

- 相关参考

 

 

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