Debian GNU/Linux Rssh安全绕过漏洞

来源:岁月联盟 编辑:zhuzhu 时间:2006-07-20
Debian GNU/Linux Rssh安全绕过漏洞 受影响系统: 
Debian rssh 2.3.0-1
不受影响系统: 
Debian rssh sid 2.3.0-1.1
Debian rssh sarge 2.2.3-1
描述: 
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BUGTRAQ  ID: 18999
CVE(CAN) ID: CVE-2006-1320

rssh是一款小的shell,可以帮助系统管理员为特定用户提供通过scp和sftp登陆某系统的功能。

rssh处理用户命令时存在漏洞,成功利用这个漏洞的安全者可以绕过安全限制,获得非授权访问。

由于util.c中缺少大括号({}),如果rssh检查所发布的命令是否为CVS的话,检查总会成功。由于所调用的命令实际为/usr/bin/cvs并且会绕过对-e选项的安全检查,因此安全者可以利用这种检查失效向CVS传递-e选项。



<*来源:Russ Allbery (rra@debian.org)
  
  链接:http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=346322
        http://www.debian.org/security/2005/dsa-1109
*>

建议: 
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厂商补丁:

Debian
------
Debian已经为此发布了一个安全公告(DSA-1109-1)以及相应补丁:
DSA-1109-1:New rssh packages fix privilege escalation
链接:http://www.debian.org/security/2005/dsa-1109

补丁下载:

Source archives:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2.dsc
Size/MD5 checksum:      589 a8ccbaa1d14d0aa30b3eb0bb1aefd4e5
http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2.diff.gz
Size/MD5 checksum:    52207 00e3ad8c7944ed55e1316e414ab3d388
http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3.orig.tar.gz
Size/MD5 checksum:   107216 74f40a4fd5d2b097af34a817e21a33cf

Alpha architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_alpha.deb
Size/MD5 checksum:    48782 0388514b947030f42219c9a615527dd9

AMD64 architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_amd64.deb
Size/MD5 checksum:    44472 021a58e5c2591e2a15e4f1804816aa7b

ARM architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_arm.deb
Size/MD5 checksum:    41974 98eb40b5011e7868b02edfc07591f005

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_i386.deb
Size/MD5 checksum:    42596 7236c31d25f8b4cbbb8894112aa585aa

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_ia64.deb
Size/MD5 checksum:    55530 9c61a904a78c4c6d93763cdb73f9c009

HP Precision architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_hppa.deb
Size/MD5 checksum:    44098 334ae1019286051be323bf6994d51c99

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_m68k.deb
Size/MD5 checksum:    41522 0efafd5a441d6d392d1a2490bfb2dcc4

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_mips.deb
Size/MD5 checksum:    49520 7126170731d1b5ad12d7afb6d68c16b7

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_mipsel.deb
Size/MD5 checksum:    49546 7d8859c87eeb09f3b2502cfbed3c3f66

PowerPC architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_powerpc.deb
Size/MD5 checksum:    42936 f68184985e1ec6c27518ac74404afbec

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_s390.deb
Size/MD5 checksum:    42596 29243bae45e1dca2c07ca609617c0bfa

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/r/rssh/rssh_2.2.3-1.sarge.2_sparc.deb
Size/MD5 checksum:    42532 59db16aa282bc182f79418fdd99341c0

补丁安装方法:

1. 手工安装补丁包:

  首先,使用下面的命令来下载补丁软件:
  # wget url  (url是补丁下载链接地址)

  然后,使用下面的命令来安装补丁:  
  # dpkg -i file.deb (file是相应的补丁名)

2. 使用apt-get自动安装补丁包:

   首先,使用下面的命令更新内部数据库:
   # apt-get update
   
   然后,使用下面的命令安装更新软件包:
   # apt-get upgrade 

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