CVE-2002-0515
CVSS5.0
发布时间 :2002-08-12 00:00:00
修订时间 :2008-09-05 16:28:13
NMCOS    

[原文]IPFilter 3.4.25 and earlier sets a different TTL when a port is being filtered than when it is not being filtered, which allows remote attackers to identify filtered ports by comparing TTLs.


[CNNVD]IPFilter可用TTL字段值识别漏洞(CNNVD-200208-131)

        
        IPFilter是一款免费的开放源代码的防火墙程序,由Darren Reed编写,可使用在多种Unix和Linux操作系统平台下。
        IPFilter在应答请求的处理上存在问题,可导致攻击者收集防火墙设置规则信息。
        攻击者可以通过连接由Ipfilter过滤的TCP口提交请求,IPFilter会返回一个RST信息包,凭此可判断过滤和未过滤的端口信息。如果一个端口由Ipfilter过滤会返回TTL值设置为60的RST包,而没有过滤的由操作系统返回的是带有默认TTL值的RST包。
        

- CVSS (基础分值)

CVSS分值: 5 [中等(MEDIUM)]
机密性影响: PARTIAL [很可能造成信息泄露]
完整性影响: NONE [不会对系统完整性产生影响]
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: [--]
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)

产品及版本信息(CPE)暂不可用

- 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-2002-0515
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2002-0515
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-200208-131
(官方数据源) CNNVD

- 其它链接及资源

http://www.securityfocus.com/bid/4403
(VENDOR_ADVISORY)  BID  4403
http://www.securityfocus.com/archive/1/265188
(VENDOR_ADVISORY)  BUGTRAQ  20020331 packet filter fingerprinting(open but closed, closed but filtered)
http://www.iss.net/security_center/static/8738.php
(VENDOR_ADVISORY)  XF  firewall-rst-fingerprint(8738)

- 漏洞信息

IPFilter可用TTL字段值识别漏洞
中危 设计错误
2002-08-12 00:00:00 2005-10-20 00:00:00
远程  
        
        IPFilter是一款免费的开放源代码的防火墙程序,由Darren Reed编写,可使用在多种Unix和Linux操作系统平台下。
        IPFilter在应答请求的处理上存在问题,可导致攻击者收集防火墙设置规则信息。
        攻击者可以通过连接由Ipfilter过滤的TCP口提交请求,IPFilter会返回一个RST信息包,凭此可判断过滤和未过滤的端口信息。如果一个端口由Ipfilter过滤会返回TTL值设置为60的RST包,而没有过滤的由操作系统返回的是带有默认TTL值的RST包。
        

- 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:
        Darren Reed
        -----------
        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://coombs.anu.edu.au/~avalon/ip-filter.html

- 漏洞信息

4690
IPFilter TTL Fingerprint Disclosure

- 漏洞描述

Unknown or Incomplete

- 时间线

2002-03-31 Unknow
Unknow Unknow

- 解决方案

Unknown or Incomplete

- 相关参考

- 漏洞作者

Unknown or Incomplete

- 漏洞信息

IPFilter TTL Fingerprinting Vulnerability
Design Error 4403
Yes No
2002-03-31 12:00:00 2009-07-11 11:56:00
Vulnerability discovery credited to Meder Kydyraliev <bugtraq@web.areopag.net>.

- 受影响的程序版本

Darren Reed IPFilter 3.4.25
- BSDI BSD/OS 4.0
- BSDI BSD/OS 3.1
- BSDI BSD/OS 3.0
- BSDI BSD/OS 2.1
- BSDI BSD/OS 2.0.1
- BSDI BSD/OS 2.0
- BSDI BSD/OS 1.1
- FreeBSD FreeBSD 2.2.8
- FreeBSD FreeBSD 2.2.6
- FreeBSD FreeBSD 2.2.5
- FreeBSD FreeBSD 2.2.4
- FreeBSD FreeBSD 2.2.3
- FreeBSD FreeBSD 2.2.2
- FreeBSD FreeBSD 2.2
- FreeBSD FreeBSD 2.1.6
- FreeBSD FreeBSD 2.1.5
- FreeBSD FreeBSD 2.1
- FreeBSD FreeBSD 2.0.5
- FreeBSD FreeBSD 2.0
- HP HP-UX 11.0
- NetBSD NetBSD 1.4
- NetBSD NetBSD 1.3.3
- NetBSD NetBSD 1.3.2
- NetBSD NetBSD 1.3.1
- NetBSD NetBSD 1.3
- NetBSD NetBSD 1.2.1
- NetBSD NetBSD 1.2
- NetBSD NetBSD 1.1
- NetBSD NetBSD 1.0
- OpenBSD OpenBSD 2.9
- OpenBSD OpenBSD 2.8
- OpenBSD OpenBSD 2.7
- OpenBSD OpenBSD 2.6
- OpenBSD OpenBSD 2.5
- OpenBSD OpenBSD 2.4
- OpenBSD OpenBSD 2.3
- OpenBSD OpenBSD 2.2
- OpenBSD OpenBSD 2.1
- OpenBSD OpenBSD 2.0
- SGI IRIX 6.2
- Sun Solaris 2.5.1 _x86
- Sun Solaris 2.5.1
- Sun Solaris 8_x86
- Sun Solaris 8_sparc
- Sun Solaris 7.0_x86
- Sun Solaris 7.0
- Sun Solaris 2.6_x86
- Sun Solaris 2.6
- Sun Solaris 2.5_x86
- Sun Solaris 2.5
- Sun Solaris 2.4_x86
- Sun Solaris 2.4
- Sun Solaris 2.3
- Sun SunOS 4.1.4
- Sun SunOS 4.1.3
- Sun SunOS 4.1.2
- Sun SunOS 4.1.1

- 漏洞讨论

IPFilter is a freely available, open source firewall package written by Darren Reed. It is available for multiple platforms, including Unix and Linux operating systems.

Under some circumstances, IPFilter sends responses that can allow an attacker to gain information about the firewall ruleset. When an attempt is made to connect to a system via TCP on a port that is filtered by IPFilter, and IPFilter returns a RST, it is possible to differentiate between filtered and unfiltered ports. A port that is filtered by IPFilter will return a RST with a TTL field set to 60, whereas the operating system will return it's default TTL value for a RST.

- 漏洞利用

This vulnerability may be exploited by using one of numerous available portscanning utilities and packet analysis utilities.

- 解决方案

Currently the SecurityFocus staff 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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