发布日期：2002-09-13
更新日期：2002-09-18

受影响系统：

Purity Purity 1-15
Purity Purity 1-14
Purity Purity 1-9
    - Debian Linux 3.0
    - Debian Linux 2.2

不受影响系统：

Purity Purity 1-16

描述：

---

BUGTRAQ  ID: 5702
CVE(CAN) ID: CVE-2002-1124

purity是一款安装在Debian系统下的游戏程序。

purity存在多个本地缓冲区溢出问题，本地攻击者以利用这些漏洞以game组的权限在系统上执行任意指令。

purity对用户提交的数据缺少正确的缓冲区边界检查，由于purity以game的组ID默认安装，成功利用这个漏洞可导致本地用户权限提升。

<*链接：http://www.debian.org/security/2002/dsa-166
*>

建议：

---

临时解决方法：

如果您不能立刻安装补丁或者升级，NSFOCUS建议您采取以下措施以降低威胁：

* 暂时去掉Purity的setgid位属性。

厂商补丁：

Debian
------
Debian已经为此发布了一个安全公告（DSA-166-1）以及相应补丁:
DSA-166-1：New purity packages fix potential buffer overflows
链接：http://www.debian.org/security/2002/dsa-166

补丁下载：

Source archives:

http://security.debian.org/pool/updates/main/p/purity/purity_1-9.1.dsc
Size/MD5 checksum:      513 a7a4276a6c694131a5b3bd58703c8c05
http://security.debian.org/pool/updates/main/p/purity/purity_1-9.1.diff.gz
Size/MD5 checksum:     5147 db47d2d1f51b5f8c97bcb93974b7b5cf
http://security.debian.org/pool/updates/main/p/purity/purity_1.orig.tar.gz
Size/MD5 checksum:    22249 19cbbd136a94aae3d175d8ccc963368d

Alpha architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-9.1_alpha.deb
Size/MD5 checksum:    29176 f69989e76361e30813eb233aa500b9c6

ARM architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-9.1_arm.deb
Size/MD5 checksum:    27762 169dce544dcab575cc126800eeabb6ce

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-9.1_i386.deb
Size/MD5 checksum:    27404 6eb60f91f4cd3730bef018115268c568

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-9.1_m68k.deb
Size/MD5 checksum:    26934 d1337244388c4b5a183b379e34b37fd1

PowerPC architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-9.1_powerpc.deb
Size/MD5 checksum:    27760 140ce3d691acc98c27dd6851972db0e9

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-9.1_sparc.deb
Size/MD5 checksum:    29952 cb2b48e0465b48b89b220feb30818113


Debian GNU/Linux 3.0 alias woody
- --------------------------------

Source archives:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2.dsc
Size/MD5 checksum:      550 8e669427422857640b0531e3566706f9
http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2.diff.gz
Size/MD5 checksum:     6171 6901ba40ea0938bab43a893e4f75da8a
http://security.debian.org/pool/updates/main/p/purity/purity_1.orig.tar.gz
Size/MD5 checksum:    22249 19cbbd136a94aae3d175d8ccc963368d

Alpha architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_alpha.deb
Size/MD5 checksum:    28890 ecb67c79c8047cc631cf63d6fcd93996

ARM architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_arm.deb
Size/MD5 checksum:    27434 6bb8ed0579e96fcff971086d750937ce

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_i386.deb
Size/MD5 checksum:    26906 7ec62b9371253879b93fe6db0ef75945

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_ia64.deb
Size/MD5 checksum:    30694 7c26d3db982acf14a2e8133cf204e164

HP Precision architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_hppa.deb
Size/MD5 checksum:    29234 ceb6569248e96d1fd415de15f8f26370

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_m68k.deb
Size/MD5 checksum:    26560 4385599f2f16238c4b2628c9a8fc54cc

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_mips.deb
Size/MD5 checksum:    27798 e6b360203cd31c13f19d5bc257684f64

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_mipsel.deb
Size/MD5 checksum:    27756 12bb21c88be3011bfd50045a73361255

PowerPC architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_powerpc.deb
Size/MD5 checksum:    27306 c782697984b5e8ae83ed16c594d80437

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_s390.deb
Size/MD5 checksum:    27624 c370933a2db896857c5fa3bb86a2a2db

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/p/purity/purity_1-14.2_sparc.deb
Size/MD5 checksum:    29980 e48dcb304202e2e29634bd51dbd307a3

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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