xml.c文件拒绝服务漏洞

发布日期:2009-06-06
更新日期:2009-06-09

受影响系统:
Apache Group APR-util 1.3.x
不受影响系统:
Apache Group APR-util 1.3.7
描述:
--------------------------------------------------------------------------------
BUGTRAQ  ID: 35253
CVE(CAN) ID: CVE-2009-1955

Apr-util是Apache所使用的Apache可移植运行时工具库。

APR-util库所使用的expat XML解析器(位于xml/apr_xml.c文件的apr_xml_*接口)在处理实体定义中包含有大量嵌套实体引用的XML文件时可能会耗尽所有可用的内存,导致拒绝服务的情况。所有使用APR-util库的expat wrapper接口解析不可信任XML文档的网络服务都受这个漏洞影响,如Apache httpd WebDAV模块mod_dav。

<*来源:Joe Orton
 
  链接:?l=apr-dev&m=124396021826125&w=2
       
       
*>

测试方法:
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警 告

以下程序(方法)可能带有攻击性,仅供安全研究与教学之用。使用者风险自负!

建议:
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厂商补丁:

Apache Group
------------
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:

?event3=381000&goto=http%3A%2F%2Fsvn.apache.org%2Fviewvc%3Fview%3Drev%26revision%3D781403

Debian
------
Debian已经为此发布了一个安全公告(DSA-1812-1)以及相应补丁:
DSA-1812-1:New apr-util packages fix several vulnerabilities
链接:

补丁下载:

Source archives:

+dfsg-2+etch2.diff.gz
Size/MD5 checksum:    33117 ed3dc8bd1a5891432d7fc0614b94becd
+dfsg.orig.tar.gz
Size/MD5 checksum:   643328 a3117be657f99e92316be40add59b9ff
+dfsg-2+etch2.dsc
Size/MD5 checksum:     1036 982d6c15afd4477277b01c004b7c8ac0

alpha architecture (DEC Alpha)

+dfsg-2+etch2_alpha.deb
Size/MD5 checksum:    83614 7bc2f02a403bb653dde89fc6efd34e7b
+dfsg-2+etch2_alpha.deb
Size/MD5 checksum:   148054 45641c57b04ca3470eda5df4ce26742c
+dfsg-2+etch2_alpha.deb
Size/MD5 checksum:   128914 03bc9c912b8b625af79f39284d45eeed

amd64 architecture (AMD x86_64 (AMD64))

+dfsg-2+etch2_amd64.deb
Size/MD5 checksum:    72828 4fc0d12955c259cf26aab065b174ccf3
+dfsg-2+etch2_amd64.deb
Size/MD5 checksum:   127854 fec6f28c19ad170d97e431a8657d6d3b
+dfsg-2+etch2_amd64.deb
Size/MD5 checksum:   124516 6097da9f80f44b379f1b1d46aa13867a

arm architecture (ARM)

+dfsg-2+etch2_arm.deb
Size/MD5 checksum:    66038 d7c116a4589f3f280d3a8f6f698afc8a
+dfsg-2+etch2_arm.deb
Size/MD5 checksum:   116800 e46133d4e4e2191dae95e7d70df22b41
+dfsg-2+etch2_arm.deb
Size/MD5 checksum:   121028 8d1d8a51de432ecdca221d3aab3a0342

hppa architecture (HP PA RISC)

+dfsg-2+etch2_hppa.deb
Size/MD5 checksum:   133822 0060e1aa0428f163fd8a2391afd42d86
+dfsg-2+etch2_hppa.deb
Size/MD5 checksum:   126066 a197984d5f90879bfd5f5161d82fb793
+dfsg-2+etch2_hppa.deb
Size/MD5 checksum:    78586 4dce52054b7fd81027e5f002d36b9ca1

i386 architecture (Intel ia32)

+dfsg-2+etch2_i386.deb
Size/MD5 checksum:    68680 d65d8158a672fc285a5329a96f927ff0
+dfsg-2+etch2_i386.deb
Size/MD5 checksum:   116416 0fffc0910d45788aa2e5632913f97b5e
+dfsg-2+etch2_i386.deb
Size/MD5 checksum:   122170 5c6fe8e442ec6aa146cc5f534d045e70

ia64 architecture (Intel ia64)

+dfsg-2+etch2_ia64.deb
Size/MD5 checksum:   118768 c240a8957e74b4133d14524d65a0ca84
+dfsg-2+etch2_ia64.deb
Size/MD5 checksum:   156554 75f7ef24fb756f82c41c376fbb976eb2
+dfsg-2+etch2_ia64.deb
Size/MD5 checksum:    99380 31a30996ae576e028cd7d1b0e248096d

mips architecture (MIPS (Big Endian))

+dfsg-2+etch2_mips.deb
Size/MD5 checksum:   130216 64f856948c06a836e1e7ccb5288a8fd5
+dfsg-2+etch2_mips.deb
Size/MD5 checksum:   130378 5c2bcd90e3e764b63fad5e7108f2f5c7
+dfsg-2+etch2_mips.deb
Size/MD5 checksum:    70666 d8f16a952a9b49f1c1cce2dba45d4b67

mipsel architecture (MIPS (Little Endian))

+dfsg-2+etch2_mipsel.deb
Size/MD5 checksum:   130588 d24b45d678dd58b62518ddf1f6d9fd2f
+dfsg-2+etch2_mipsel.deb
Size/MD5 checksum:   127794 2d8ed73655993e12cdb0d4b316315f2c
+dfsg-2+etch2_mipsel.deb
Size/MD5 checksum:    70674 5242004658e91c173b717bde60a8085e

powerpc architecture (PowerPC)

+dfsg-2+etch2_powerpc.deb
Size/MD5 checksum:   130406 0016513b87ff4564f5ff69621d431e13
+dfsg-2+etch2_powerpc.deb
Size/MD5 checksum:   125072 bc5539dda0daa900abfe77a088899f16
+dfsg-2+etch2_powerpc.deb
Size/MD5 checksum:    72400 28647bd35db14975a678c4424f0fb4aa

s390 architecture (IBM S/390)

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