发布日期：2003-10-15
更新日期：2003-11-05

受影响系统：

Dug Song dsniff 2.3
Rafal Wojtczuk Libnids 1.17
Rafal Wojtczuk Libnids 1.14
Rafal Wojtczuk Libnids 1.13
Rafal Wojtczuk Libnids 1.12
Rafal Wojtczuk Libnids 1.11
Rafal Wojtczuk Libnids 1.16
    - Conectiva Linux 9.0
    - Conectiva Linux 8.0
    - Conectiva Linux 7.0

不受影响系统：

Rafal Wojtczuk Libnids 1.18

描述：

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BUGTRAQ  ID: 8905
CVE(CAN) ID: CVE-2003-0850

Libnids是一款NIDS功能实现库。

Libnids在处理TCP重组的时候缺少正确的缓冲区边界检查，远程攻击者可以利用这个漏洞进行缓冲区溢出攻击。

Libnids提供IP分片，TCP流重组和端口扫描检测等功能，Libnids在处理过大的TCP包时存在问题，可导致发送恶意TCP包使使用Libnids TCP包重组功能的应用程序崩溃，精心提供恶意数据可能以应用程序进程在系统上执行任意指令。

<*来源：Robert Watson （rwatson@FreeBSD.org）
  
  链接：http://marc.theaimsgroup.com/?l=bugtraq&m=106728224210446&w=2
        http://distro.conectiva.com/atualizacoes/?id=a&anuncio=000773
*>

建议：

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厂商补丁：

Conectiva
---------
Conectiva已经为此发布了一个安全公告（CLA-2003:773）以及相应补丁:
CLA-2003:773：libnids
链接：http://distro.conectiva.com/atualizacoes/?id=a&anuncio=000773

补丁下载：

Conectiva Upgrade libnids-1.18-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libnids-1.18-1U70_1cl.i386.rpm

Conectiva Upgrade libnids-devel-1.18-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libnids-devel-1.18-1U70_1cl.i386.rpm

Conectiva Upgrade libnids-devel-static-1.18-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libnids-devel-static-1.18-1U70_1cl.i386.rpm

Conectiva Upgrade libnids-1.18-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libnids-1.18-1U80_1cl.i386.rpm

Conectiva Upgrade libnids-devel-1.18-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libnids-devel-1.18-1U80_1cl.i386.rpm

Conectiva Upgrade libnids-devel-static-1.18-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libnids-devel-static-1.18-1U80_1cl.i386.rpm

Conectiva Upgrade libnids-1.18-8448U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libnids-1.18-8448U90_1cl.i386.rpm

Conectiva Upgrade libnids-devel-1.18-8448U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libnids-devel-1.18-8448U90_1cl.i386.rpm

Conectiva Upgrade libnids-devel-static-1.18-8448U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libnids-devel-static-1.18-8448U90_1cl.i386.rpm

Dug Song dsniff 2.3:

Conectiva Upgrade dsniff-2.3-4U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/dsniff-2.3-4U70_1cl.i386.rpm

Conectiva Upgrade dsniff-2.3-7U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/dsniff-2.3-7U80_1cl.i386.rpm

Conectiva Upgrade dsniff-webspy-2.3-7U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/dsniff-webspy-2.3-7U80_1cl.i386.rpm

Conectiva Upgrade dsniff-2.3-24591U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/dsniff-2.3-24591U90_1cl.i386.rpm

Conectiva Upgrade dsniff-webspy-2.3-24591U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/dsniff-webspy-2.3-24591U90_1cl.i386.rpm

Rafal Wojtczuk
--------------
目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载：

Rafal Wojtczuk Upgrade Libnids 1.18
https://sourceforge.net/project/showfiles.php?group_id=92215

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