| CVE-2002-0510 |
|
发布时间 :2002-08-12 00:00:00 | ||
| 修订时间 :2008-09-05 16:28:13 | ||||
| NMCOS |
[原文]The UDP implementation in Linux 2.4.x kernels keeps the IP Identification field at 0 for all non-fragmented packets, which could allow remote attackers to determine that a target system is running Linux.
[CNNVD]Linux 2.4 UDP报文的IP ID域固定为0漏洞(CNNVD-200208-024)
Linux Kernel 2.4.x在UDP实现上存在问题，使得攻击者可以远程识别内核版本。
在Kernel 2.4.10上用nslookup做一次简单的DNS查询
UDP TTL:64 TOS:0x0 ID:0 IpLen:20 DgmLen:63 DF Len: 43
BC 0D 01 00 00 01 00 00 00 00 00 00 03 77 77 77 .............www
03 63 6E 6E 03 63 6F 6D 05 6C 6F 63 61 6C 00 00 .cnn.com.local..
01 00 01 ...
发送出去的UDP报文的IP ID域固定是0。
对一台Linux 2.4.18机器的ECHO服务端口发关UDP报文
-> y.y.y.y:7 UDP TTL:64 TOS:0x0 ID:28256 IpLen:20 DgmLen:28 Len: 8
y.y.y.y:7 -> UDP TTL:50 TOS:0x0 ID:0 IpLen:20 DgmLen:28 DF Len: 8
响应报文的IP ID域固定是0。
- 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)
| cpe:/o:linux:linux_kernel:2.4.16 | Linux Kernel 2.4.16 |
| cpe:/o:linux:linux_kernel:2.4.1 | Linux Kernel 2.4.1 |
| cpe:/o:linux:linux_kernel:2.4.6 | Linux Kernel 2.4.6 |
| cpe:/o:linux:linux_kernel:2.4.5 | Linux Kernel 2.4.5 |
| cpe:/o:linux:linux_kernel:2.4.17 | Linux Kernel 2.4.17 |
| cpe:/o:linux:linux_kernel:2.4.14 | Linux Kernel 2.4.14 |
| cpe:/o:linux:linux_kernel:2.4.7 | Linux Kernel 2.4.7 |
| cpe:/o:linux:linux_kernel:2.4.10 | Linux Kernel 2.4.10 |
| cpe:/o:linux:linux_kernel:2.4.11 | Linux Kernel 2.4.11 |
| cpe:/o:linux:linux_kernel:2.4.12 | Linux Kernel 2.4.12 |
| cpe:/o:linux:linux_kernel:2.4.4 | Linux Kernel 2.4.4 |
| cpe:/o:linux:linux_kernel:2.4.13 | Linux Kernel 2.4.13 |
| cpe:/o:linux:linux_kernel:2.4.9 | Linux Kernel 2.4.9 |
| cpe:/o:linux:linux_kernel:2.4.0 | Linux Kernel 2.4.0 |
| cpe:/o:linux:linux_kernel:2.4.15 | Linux Kernel 2.4.15 |
| cpe:/o:linux:linux_kernel:2.4.2 | Linux Kernel 2.4.2 |
| cpe:/o:linux:linux_kernel:2.4.8 | Linux Kernel 2.4.8 |
| cpe:/o:linux:linux_kernel:2.4.18 | Linux Kernel 2.4.18 |
| cpe:/o:linux:linux_kernel:2.4.3 | Linux Kernel 2.4.3 |
- 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
- 其它链接及资源
|
http://www.securityfocus.com/bid/4314 (VENDOR_ADVISORY) BID 4314 |
|
http://www.securityfocus.com/archive/1/262840 (VENDOR_ADVISORY) BUGTRAQ 20020319 Identifying Kernel 2.4.x based Linux machines using UDP |
|
http://www.iss.net/security_center/static/8588.php (VENDOR_ADVISORY) XF linux-udp-fingerprint(8588) |
- 漏洞信息
| Linux 2.4 UDP报文的IP ID域固定为0漏洞 | |
| 中危 | 设计错误 |
| 2002-08-12 00:00:00 | 2005-10-20 00:00:00 |
| 远程 | |
| Linux Kernel 2.4.x在UDP实现上存在问题，使得攻击者可以远程识别内核版本。 在Kernel 2.4.10上用nslookup做一次简单的DNS查询 UDP TTL:64 TOS:0x0 ID:0 IpLen:20 DgmLen:63 DF Len: 43 BC 0D 01 00 00 01 00 00 00 00 00 00 03 77 77 77 .............www 03 63 6E 6E 03 63 6F 6D 05 6C 6F 63 61 6C 00 00 .cnn.com.local.. 01 00 01 ... 发送出去的UDP报文的IP ID域固定是0。 对一台Linux 2.4.18机器的ECHO服务端口发关UDP报文 -> y.y.y.y:7 UDP TTL:64 TOS:0x0 ID:28256 IpLen:20 DgmLen:28 Len: 8 y.y.y.y:7 -> UDP TTL:50 TOS:0x0 ID:0 IpLen:20 DgmLen:28 DF Len: 8 响应报文的IP ID域固定是0。 |
|
- 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： Linux ----- 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.kernel.org/ |
- 漏洞信息
| 9587 | |
| Linux Kernel UDP Implementation IP Identification Field Remote OS Disclosure | |
| Remote / Network Access | |
- 漏洞描述
Unknown or Incomplete |
- 时间线
| 2002-03-19 | 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
| Linux 2.4 UDP Constant IP Identification Field Fingerprinting Vulnerability | |
| Design Error | 4314 |
| Yes | No |
| 2002-03-19 12:00:00 | 2009-07-11 11:56:00 |
| Discovered by Ofir Arkin <ofir@stake.com>. | |
- 受影响的程序版本
| Linux kernel 2.4.18 Linux kernel 2.4.17 Linux kernel 2.4.16 Linux kernel 2.4.15 Linux kernel 2.4.14 Linux kernel 2.4.13 Linux kernel 2.4.12 Linux kernel 2.4.11 Linux kernel 2.4.10 Linux kernel 2.4.9 Linux kernel 2.4.8 Linux kernel 2.4.7 Linux kernel 2.4.6 Linux kernel 2.4.5 Linux kernel 2.4.4 Linux kernel 2.4.3 Linux kernel 2.4.2 Linux kernel 2.4.1 Linux kernel 2.4 |
- 漏洞讨论
| A fingerprinting threat has been reported in some versions of the 2.4 Linux kernel IP stack implementation. UDP packets are transmitted with a constant IP Identification field of 0. An attacker may be able to exploit this weakness to discover the operating system and approximate kernel version of the vulnerable system. The ability to fingerprint operating systems based on minor differences in network implementations is well known, and not limited to Linux based systems. |
- 漏洞利用
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No exploit is required.
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- 解决方案
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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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