发布日期：2010-01-15
更新日期：2010-01-20

受影响系统：

LibThai LibThai < 0.1.13

不受影响系统：

LibThai LibThai 0.1.13

描述：

---

BUGTRAQ  ID: 37822
CVE(CAN) ID: CVE-2009-4012

LibThai是LINUX系统中使用的泰语支持库。

LibThai库的thbrk/thbrk.c和thwbrk/thwbrk.c文件中存在最终可导致堆溢出的整数溢出漏洞。用户受骗使用链接到该库的应用处理了超长字符串就可以触发这个溢出，导致执行任意指令。

<*来源：Tim Starling
  
  链接：http://secunia.com/advisories/38196
        http://www.debian.org/security/2010/dsa-1971
*>

建议：

---

厂商补丁：

Debian
------
Debian已经为此发布了一个安全公告（DSA-1971-1）以及相应补丁:
DSA-1971-1：New libthai packages fix arbitrary code execution
链接：http://www.debian.org/security/2010/dsa-1971

补丁下载：

Source archives:

http://security.debian.org/pool/updates/main/libt/libthai/libthai_0.1.6-1+etch1.dsc
Size/MD5 checksum:      683 c43a718e2d05c2b47af4bac86903e896
http://security.debian.org/pool/updates/main/libt/libthai/libthai_0.1.6.orig.tar.gz
Size/MD5 checksum:   847074 f085d66dc46c166c278c252898035076
http://security.debian.org/pool/updates/main/libt/libthai/libthai_0.1.6-1+etch1.diff.gz
Size/MD5 checksum:    11695 71127f5e7afcdcbfd5af6780505c7a1a

Architecture independent packages:

http://security.debian.org/pool/updates/main/libt/libthai/libthai-doc_0.1.6-1+etch1_all.deb
Size/MD5 checksum:    50312 317992ee889c0de0fe9dc9ea97a57fc6

alpha architecture (DEC Alpha)

http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.6-1+etch1_alpha.deb
Size/MD5 checksum:   275028 428557ab4a790fc85b0733d1b28dc801
http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.6-1+etch1_alpha.deb
Size/MD5 checksum:   316330 ffc67c38acf68cd77c8f6a236de187c1

amd64 architecture (AMD x86_64 (AMD64))

http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.6-1+etch1_amd64.deb
Size/MD5 checksum:   275070 aac7f0edfc5b53640626dd7843e9bf1f
http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.6-1+etch1_amd64.deb
Size/MD5 checksum:   311134 2f471ee3c58d737ddc9b5f298b45476e

hppa architecture (HP PA RISC)

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.6-1+etch1_hppa.deb
Size/MD5 checksum:   376960 a42594c08a9e2dc461bf6d41b1ffa843
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.6-1+etch1_hppa.deb
Size/MD5 checksum:   339122 97710ae2e6a4110fed1d708e5480f718

i386 architecture (Intel ia32)

http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.6-1+etch1_i386.deb
Size/MD5 checksum:   273352 8500dbe477de0cd29299ba211a45f7ae
http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.6-1+etch1_i386.deb
Size/MD5 checksum:   313540 1e7854db6cef8b1e2b9bf5065e62bcd4

ia64 architecture (Intel ia64)

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.6-1+etch1_ia64.deb
Size/MD5 checksum:   319442 092a822857a37961e6796773c033d3a8
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.6-1+etch1_ia64.deb
Size/MD5 checksum:   278182 c225f2e441ea5e2aa4b8aadcb928cd38

mips architecture (MIPS (Big Endian))

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.6-1+etch1_mips.deb
Size/MD5 checksum:   376754 467ff44afe323bae6c3dbb988da7e089
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.6-1+etch1_mips.deb
Size/MD5 checksum:   337592 1dabc2d5d7ad3baedcec607bffc4a55a

mipsel architecture (MIPS (Little Endian))

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.6-1+etch1_mipsel.deb
Size/MD5 checksum:   314592 fa20d463d069f95cda9638a3113fcd51
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.6-1+etch1_mipsel.deb
Size/MD5 checksum:   274038 1e210dff44b35d320903c915a07bf4f7

powerpc architecture (PowerPC)

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.6-1+etch1_powerpc.deb
Size/MD5 checksum:   376180 4eaf094301d96f7db8823986275c1336
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.6-1+etch1_powerpc.deb
Size/MD5 checksum:   338226 ac8eb480c5f790cd9e6c9bdf6837027c

s390 architecture (IBM S/390)

http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.6-1+etch1_s390.deb
Size/MD5 checksum:   338280 c2ca43fc46bf76c10e580b5b021ce5f7
http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.6-1+etch1_s390.deb
Size/MD5 checksum:   377418 ea0936d056392d9aef116c3ebdcdb1b3

sparc architecture (Sun SPARC/UltraSPARC)

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.6-1+etch1_sparc.deb
Size/MD5 checksum:   374490 40b15de3062e64a1528f188d6b10a646
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.6-1+etch1_sparc.deb
Size/MD5 checksum:   336808 124b46ae02cd1d558dac1123f93ed72c

Debian (stable)
- ---------------

Stable updates are available for alpha, amd64, arm, armel, hppa, i386, ia64, mips, mipsel, powerpc, s390 and sparc.

Source archives:

http://security.debian.org/pool/updates/main/libt/libthai/libthai_0.1.9.orig.tar.gz
Size/MD5 checksum:   491038 7002d111b293f202d20b28aa2b4ed68f
http://security.debian.org/pool/updates/main/libt/libthai/libthai_0.1.9-4+lenny1.dsc
Size/MD5 checksum:     1385 f3ff74195cf9278c2c24afa71ab1edd1
http://security.debian.org/pool/updates/main/libt/libthai/libthai_0.1.9-4+lenny1.diff.gz
Size/MD5 checksum:     7558 0ec2e54ed7c29f95b5bd1ae0f5db254e

Architecture independent packages:

http://security.debian.org/pool/updates/main/libt/libthai/libthai-doc_0.1.9-4+lenny1_all.deb
Size/MD5 checksum:    59400 d1d8ca56379e789fa40035dc9438a202
http://security.debian.org/pool/updates/main/libt/libthai/libthai-data_0.1.9-4+lenny1_all.deb
Size/MD5 checksum:   163256 62556f11ed47bdf3f0c0844a29b0f7a3

alpha architecture (DEC Alpha)

http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_alpha.deb
Size/MD5 checksum:    34054 d047070a3b08a380cd304ecd194109aa
http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_alpha.deb
Size/MD5 checksum:    54690 4de38aed7f22b9e01ec53ee32c05e58b

amd64 architecture (AMD x86_64 (AMD64))

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_amd64.deb
Size/MD5 checksum:    51984 9e761529b0139802363713f7e6264dec
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_amd64.deb
Size/MD5 checksum:    32856 1a21ca0f1fcc8c33df02cef4919fbb88

armel architecture (ARM EABI)

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_armel.deb
Size/MD5 checksum:    51490 adc555d0ae19aae401e2cd232fdacb40
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_armel.deb
Size/MD5 checksum:    30612 49efdccbf1aa050622c9d223b6a6a6c5

hppa architecture (HP PA RISC)

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_hppa.deb
Size/MD5 checksum:    53286 8b84d1971d792fca59ef9efa50a0884b
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_hppa.deb
Size/MD5 checksum:    32242 014d0388a134b8d8cde93003ae6434db

i386 architecture (Intel ia32)

http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_i386.deb
Size/MD5 checksum:    32160 f19a565bf901c698847ba93e42f5789a
http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_i386.deb
Size/MD5 checksum:    52164 c9b70533c0178ae34a96d9216115567a

ia64 architecture (Intel ia64)

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_ia64.deb
Size/MD5 checksum:    56774 53d03379cc4be19b1ea8e33f0534bf9a
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_ia64.deb
Size/MD5 checksum:    37010 64c9db9290de84436d02b405b239651f

mips architecture (MIPS (Big Endian))

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_mips.deb
Size/MD5 checksum:    53818 79a9a273a3cd3b4721c08f1a4f43f2eb
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_mips.deb
Size/MD5 checksum:    31532 2044421cb84b03de4829c227f6087aa1

mipsel architecture (MIPS (Little Endian))

http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_mipsel.deb
Size/MD5 checksum:    31654 523e24977ecec4050d91e8b5401a8732
http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_mipsel.deb
Size/MD5 checksum:    52506 6014c6fe90b21a31242db8f010ee1874

powerpc architecture (PowerPC)

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_powerpc.deb
Size/MD5 checksum:    52096 0e1a1abb02fe8d2c9f93ba2788d40067
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_powerpc.deb
Size/MD5 checksum:    32828 ba2908fcbb432f111e72f7fb1dd7d099

s390 architecture (IBM S/390)

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_s390.deb
Size/MD5 checksum:    52834 b67461df3f0fb2a8639007ac711ee5ad
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_s390.deb
Size/MD5 checksum:    33722 cb47d0ee8bc073b6e52853c3380ca3cd

sparc architecture (Sun SPARC/UltraSPARC)

http://security.debian.org/pool/updates/main/libt/libthai/libthai-dev_0.1.9-4+lenny1_sparc.deb
Size/MD5 checksum:    50938 977d77534530f4a9d77243fd411bd197
http://security.debian.org/pool/updates/main/libt/libthai/libthai0_0.1.9-4+lenny1_sparc.deb
Size/MD5 checksum:    31344 3b2e025f461c07c8802fb486e5aeb4d6

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

LibThai
-------
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://linux.thai.net/node/184

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