发布日期：2005-07-21
更新日期：2005-07-29

受影响系统：

zlib zlib 1.2.2
zlib zlib 1.2.1

不受影响系统：

zlib zlib 1.2.3

描述：

---

BUGTRAQ  ID: 14340
CVE(CAN) ID: CVE-2005-1849

zlib是很多应用程序都在使用的压缩库，可提供数据压缩/解压例程。

Zlib中存在拒绝服务漏洞，攻击者可能利用此漏洞进行拒绝服务攻击。

起因是函数库没有正确的处理解压例程的意外输入。由于错误的指定了解压时所使用的某些值，在打开无效的文件时可能导致函数库崩溃。

<*来源：Markus Oberhumer
  
  链接：http://www.debian.org/security/2005/dsa-763
        ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:18.zlib.asc
        http://security.gentoo.org/glsa/glsa-200507-19.xml
        http://lwn.net/Alerts/144583/?format=printable
*>

建议：

---

厂商补丁：

Debian
------
Debian已经为此发布了一个安全公告（DSA-763-1）以及相应补丁:
DSA-763-1：New zlib packages fix buffer overflow
链接：http://www.debian.org/security/2005/dsa-763

补丁下载：

Source archives:

http://security.debian.org/pool/updates/main/z/zlib/zlib_1.2.2.orig.tar.gz
Size/MD5 checksum:   430700 d43dabe3d374e299f2631c5fc5ce31f5
http://security.debian.org/pool/updates/main/z/zlib/zlib_1.2.2-4.sarge.2.dsc
Size/MD5 checksum:      807 e3fa0febf789e5c758d43476199825fd
http://security.debian.org/pool/updates/main/z/zlib/zlib_1.2.2-4.sarge.2.diff.gz
Size/MD5 checksum:    14718 e733bcc48ade3c675bc62a2554e2a453

alpha architecture (DEC Alpha)

http://security.debian.org/pool/updates/main/z/zlib/zlib1g-dev_1.2.2-4.sarge.2_alpha.deb
Size/MD5 checksum:   533980 950f2426191fd20fa1a0a1d975c5285d
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-udeb_1.2.2-4.sarge.2_alpha.udeb
Size/MD5 checksum:    57220 1d97d651c5fb317b435ca4b4e03df7f0
http://security.debian.org/pool/updates/main/z/zlib/zlib1g_1.2.2-4.sarge.2_alpha.deb
Size/MD5 checksum:    82078 804c8d3a9b53373fa8693ea4b5db059e
http://security.debian.org/pool/updates/main/z/zlib/zlib-bin_1.2.2-4.sarge.2_alpha.deb
Size/MD5 checksum:    30566 128b7f15f363185d05471bdd99fd4039

arm architecture (ARM)

http://security.debian.org/pool/updates/main/z/zlib/zlib1g-udeb_1.2.2-4.sarge.2_arm.udeb
Size/MD5 checksum:    42196 cec7d515976e1269116df86d58976ef1
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-dev_1.2.2-4.sarge.2_arm.deb
Size/MD5 checksum:   498234 80358e0e95f2be93600919065d31515c
http://security.debian.org/pool/updates/main/z/zlib/zlib1g_1.2.2-4.sarge.2_arm.deb
Size/MD5 checksum:    66728 0f055650a3092f0782bd00e10c78a64d
http://security.debian.org/pool/updates/main/z/zlib/zlib-bin_1.2.2-4.sarge.2_arm.deb
Size/MD5 checksum:    25286 6a7931194287cc37f44f3a050ca1e945

hppa architecture (HP PA RISC)

http://security.debian.org/pool/updates/main/z/zlib/zlib1g_1.2.2-4.sarge.2_hppa.deb
Size/MD5 checksum:    70420 cb03981137f73dd2fb9a2a2cc40f2d18
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-udeb_1.2.2-4.sarge.2_hppa.udeb
Size/MD5 checksum:    45430 7344c8007baae367ba7c8c4c72cfda68
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-dev_1.2.2-4.sarge.2_hppa.deb
Size/MD5 checksum:   512584 920721beba8dd6edc1c476b83bba74a0
http://security.debian.org/pool/updates/main/z/zlib/zlib-bin_1.2.2-4.sarge.2_hppa.deb
Size/MD5 checksum:    29308 bd0d18dbaf6e9edaabcbce52528cc195

i386 architecture (Intel ia32)

http://security.debian.org/pool/updates/main/z/zlib/zlib1g-udeb_1.2.2-4.sarge.2_i386.udeb
Size/MD5 checksum:    38402 764ca5f9b9f9fa58c776678225ea8a4b
http://security.debian.org/pool/updates/main/z/zlib/zlib1g_1.2.2-4.sarge.2_i386.deb
Size/MD5 checksum:    63080 f1d25909fcc26fb653ff92083e3c6b1c
http://security.debian.org/pool/updates/main/z/zlib/zlib-bin_1.2.2-4.sarge.2_i386.deb
Size/MD5 checksum:    25780 857be9a5220d54c222ded9c4faff6a22
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-dev_1.2.2-4.sarge.2_i386.deb
Size/MD5 checksum:   488024 dd74347cf85d778238ada4e5b42f8642

ia64 architecture (Intel ia64)

http://security.debian.org/pool/updates/main/z/zlib/zlib1g_1.2.2-4.sarge.2_ia64.deb
Size/MD5 checksum:    93462 6ed01ecbd1f214aa7fee259285944ea7
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-dev_1.2.2-4.sarge.2_ia64.deb
Size/MD5 checksum:   553666 a54eb90a0ac7ffef0460aed3d7f558c7
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-udeb_1.2.2-4.sarge.2_ia64.udeb
Size/MD5 checksum:    68610 56f859f0d990f5b9869dc999c3d0230d
http://security.debian.org/pool/updates/main/z/zlib/zlib-bin_1.2.2-4.sarge.2_ia64.deb
Size/MD5 checksum:    39258 7f0813ae8c8c9208d7ff68139c984f08

m68k architecture (Motorola Mc680x0)

http://security.debian.org/pool/updates/main/z/zlib/zlib-bin_1.2.2-4.sarge.2_m68k.deb
Size/MD5 checksum:    24078 8e79779625dd37e03839668cf9946fc4
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-udeb_1.2.2-4.sarge.2_m68k.udeb
Size/MD5 checksum:    34184 e7e987a0190218c343005f0e08ab130d
http://security.debian.org/pool/updates/main/z/zlib/zlib1g_1.2.2-4.sarge.2_m68k.deb
Size/MD5 checksum:    58884 c453ee8596ab35f83913a1a5652c6a7f
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-dev_1.2.2-4.sarge.2_m68k.deb
Size/MD5 checksum:   486102 29f51d071a8d50feb22ea66351039521

mips architecture (MIPS (Big Endian))

http://security.debian.org/pool/updates/main/z/zlib/zlib1g_1.2.2-4.sarge.2_mips.deb
Size/MD5 checksum:    68822 bf7815238c0cb6f79f0296d89b2fe9a8
http://security.debian.org/pool/updates/main/z/zlib/zlib-bin_1.2.2-4.sarge.2_mips.deb
Size/MD5 checksum:    31564 3ad12bca5cbd9e9818f5bc592813e149
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-udeb_1.2.2-4.sarge.2_mips.udeb
Size/MD5 checksum:    44064 3dd3202a819d9f0cceda522e22c72d0a
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-dev_1.2.2-4.sarge.2_mips.deb
Size/MD5 checksum:   510282 8c2496dd52057a439d363b113245ad6e

mipsel architecture (MIPS (Little Endian))

http://security.debian.org/pool/updates/main/z/zlib/zlib1g_1.2.2-4.sarge.2_mipsel.deb
Size/MD5 checksum:    69152 9e2754cc95ad0981969a683317e098cb
http://security.debian.org/pool/updates/main/z/zlib/zlib-bin_1.2.2-4.sarge.2_mipsel.deb
Size/MD5 checksum:    31538 7b2548f4afb248be93d4dfbb3e76ff93
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-dev_1.2.2-4.sarge.2_mipsel.deb
Size/MD5 checksum:   509596 630a54c28569edbb2137831993d58e9e
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-udeb_1.2.2-4.sarge.2_mipsel.udeb
Size/MD5 checksum:    44320 3f8f84d2c70973d46af65ef9a4a0cc07

powerpc architecture (PowerPC)

http://security.debian.org/pool/updates/main/z/zlib/zlib-bin_1.2.2-4.sarge.2_powerpc.deb
Size/MD5 checksum:    30008 543bcd8e27d7899d2df07dd2ba9fabf6
http://security.debian.org/pool/updates/main/z/zlib/zlib1g_1.2.2-4.sarge.2_powerpc.deb
Size/MD5 checksum:    69670 9bc554e8b2783e93c80c7545b267dac0
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-dev_1.2.2-4.sarge.2_powerpc.deb
Size/MD5 checksum:   522700 14660718b619efe6022e70be92cfb297
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-udeb_1.2.2-4.sarge.2_powerpc.udeb
Size/MD5 checksum:    44796 a4469df0bfa2c207a5670cf72d6618a8

s390 architecture (IBM S/390)

http://security.debian.org/pool/updates/main/z/zlib/zlib1g-udeb_1.2.2-4.sarge.2_s390.udeb
Size/MD5 checksum:    42554 8e3b601e51c37543f487e7bfdbdd0fae
http://security.debian.org/pool/updates/main/z/zlib/zlib-bin_1.2.2-4.sarge.2_s390.deb
Size/MD5 checksum:    27226 edd658b54958ac949e03b18a16c16701
http://security.debian.org/pool/updates/main/z/zlib/zlib1g_1.2.2-4.sarge.2_s390.deb
Size/MD5 checksum:    67080 1573e6dac04a89f6112bb49841f67907
http://security.debian.org/pool/updates/main/z/zlib/lib64z1_1.2.2-4.sarge.2_s390.deb
Size/MD5 checksum:    52628 16afd72e2349e5d142cf6f4650a93478
http://security.debian.org/pool/updates/main/z/zlib/lib64z1-dev_1.2.2-4.sarge.2_s390.deb
Size/MD5 checksum:    55560 f06d56fab2f10b1b66924d6c3797a51b
http://security.debian.org/pool/updates/main/z/zlib/zlib1g-dev_1.2.2-4.sarge.2_s390.deb
Size/MD5 checksum:   539004 e503ff8b0920cf33003f

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

FreeBSD
-------
FreeBSD已经为此发布了一个安全公告（FreeBSD-SA-05:18）以及相应补丁:
FreeBSD-SA-05:18：Buffer overflow in zlib
链接：ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:18.zlib.asc

补丁下载：

# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:18/zlib.patch
# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:18/zlib.patch.asc

RedHat
------
RedHat已经为此发布了一个安全公告（RHSA-2005:584-01）以及相应补丁:
RHSA-2005:584-01：Important: zlib security update
链接：http://lwn.net/Alerts/144583/?format=printable

Gentoo
------
Gentoo已经为此发布了一个安全公告（GLSA-200507-19）以及相应补丁:
GLSA-200507-19：zlib: Buffer overflow
链接：http://security.gentoo.org/glsa/glsa-200507-19.xml

所有zlib用户都应升级到最新版本：

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-libs/zlib-1.2.3"

zlib
----
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：

http://www.zlib.net/zlib-1.2.3.tar.gz

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