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攻击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，因此攻击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

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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