headers()函数空指针引用拒绝服务漏洞

发布日期:2009-10-27
更新日期:2009-11-25

受影响系统:
Igor Sysoev nginx 0.8.x
Igor Sysoev nginx 0.7.x
Igor Sysoev nginx 0.6.x
Igor Sysoev nginx 0.5.x
Igor Sysoev nginx 0.4.x
不受影响系统:
Igor Sysoev nginx 0.8.14
Igor Sysoev nginx 0.7.62
Igor Sysoev nginx 0.6.39
Igor Sysoev nginx 0.5.38
描述:
--------------------------------------------------------------------------------
BUGTRAQ  ID: 36839
CVE(CAN) ID: CVE-2009-3896

nginx是多平台的HTTP服务器和邮件代理服务器。

nginx服务器的src/http/ngx_http_parse.c文件的ngx_http_process_request_headers()函数中存在空指针引用错误,远程攻击者可以通过超长的URI来触发这个漏洞,导致worker进程崩溃。

<*来源:Jasson Bell (zeuspenguin@gmail.com)
 
  链接:https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=539565
        ?bug=552035
       
*>

测试方法:
--------------------------------------------------------------------------------

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!

?bug=552035

建议:
--------------------------------------------------------------------------------
厂商补丁:

Debian
------
Debian已经为此发布了一个安全公告(DSA-1920-1)以及相应补丁:
DSA-1920-1:New nginx packages fix denial of service
链接:

补丁下载:

Source archives:


Size/MD5 checksum:   436610 d385a1e7a23020d421531818d5606b5b
+etch3.dsc
Size/MD5 checksum:      611 c4e1baf967a3dbb19a28bf2da8c32fdb
+etch3.diff.gz
Size/MD5 checksum:     6822 794447a883501912bf6f448b9a561293

alpha architecture (DEC Alpha)

+etch3_alpha.deb
Size/MD5 checksum:   211432 14edf103968d05ed6b3f0149e790881c

amd64 architecture (AMD x86_64 (AMD64))

+etch3_amd64.deb
Size/MD5 checksum:   196040 70ac342b4cf946ad70d9914c5bc54d38

arm architecture (ARM)

+etch3_arm.deb
Size/MD5 checksum:   187230 0caef4e2898e11690a49eb45a539ad37

hppa architecture (HP PA RISC)

+etch3_hppa.deb
Size/MD5 checksum:   205304 05e92ede05223ee00832a7fa22f8712f

i386 architecture (Intel ia32)

+etch3_i386.deb
Size/MD5 checksum:   184404 764b3c087859dcf45d888fe6c7f55176

ia64 architecture (Intel ia64)

+etch3_ia64.deb
Size/MD5 checksum:   278594 4ae16a2fe0a790a1eb567aa2a2c909ea

mips architecture (MIPS (Big Endian))

+etch3_mips.deb
Size/MD5 checksum:   208380 a7408a0c1f14f235aec3c9f3a12d5694

mipsel architecture (MIPS (Little Endian))

+etch3_mipsel.deb
Size/MD5 checksum:   207790 67255cb5b5848c714921d0a44abd449d

powerpc architecture (PowerPC)

+etch3_powerpc.deb
Size/MD5 checksum:   186666 a0a0505d498f51d2a63e615e8e3e8fe7

s390 architecture (IBM S/390)

+etch3_s390.deb
Size/MD5 checksum:   199838 b0d4f3cc9878b0280a8e56a0bd29bd53

sparc architecture (Sun SPARC/UltraSPARC)

+etch3_sparc.deb
Size/MD5 checksum:   185332 9fdd4b7725b4060a311d7f35f9266cfb


Debian GNU/Linux 5.0 alias lenny
- --------------------------------

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

Source archives:

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