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Q&A °Ô½ÃÆÇ



  ¸®´ª½º Ä¿³Î Ãë¾àÁ¡ ¾È³». ( ¼­¹öÈ£½ºÆÃ °í°´¸¸ ÇØ´ç)
     2009-09-01 16:33:03 12567 

¸®´ª½º Ä¿³Î Ãë¾àÁ¡ ¾È³»

1. ÇØ´ç °í°´: ¼­¹öÈ£½ºÆÃ/ÄÚ·ÎÄÉÀÌ¼Ç ¸®´ª½º OS »ç¿ë °í°´
(´Ü, °ü¸®Çü ¼­ºñ½º ÀÌ¿ë °í°´À» Á¦¿ÜµË´Ï´Ù.)

2. °³¿ä
2009.8.13 ´ëºÎºÐÀÇ ¸®´ª½º Ä¿³Î ¹öÁ¯¿¡¼­ ·ÎÄà ±ÇÇÑ »ó½Â Ãë¾àÁ¡ÀÌ ¹ß°ßµÇ¾ú½À´Ï´Ù.

3. ¼³¸í
À̹ø Ãë¾àÁ¡Àº proto_ops ±¸Á¶Ã¼ÀÇ ÃʱâÈ­°¡ Á¦´ë·Î µÇÁö ¾ÊÀº »óÅ¿¡¼­ sock_sendpage() ÇÔ¼ö¿¡¼­ ³Î Æ÷ÀÎÅ͸¦ ÂüÁ¶Çϱ⠶§¹®¿¡ ¹ß»ýÇÏ¿´½À´Ï´Ù.
ÀÌ·Î ÀÎÇØ ¿µÇâ ¹Þ´Â ½Ã½ºÅÛ »ó¿¡¼­ °ø°ÝÀÚ´Â ½´ÆÛ À¯Àú ±ÇÇÑÀ» ȹµæÇÏ¿© ÀÓÀÇÀÇ Äڵ带 ½ÇÇàÇϰųª ¼­ºñ½º¸¦ ºÒ´É »óÅ·Π¸¸µé ¼ö ÀÖ½À´Ï´Ù.

4. ¿µÇâ ¹Þ´Â Ä¿³Î ¹öÁ¯
Linux 2.4: 2.4.4 ~ 2.4.37.4
Linux 2.6: 2.6.0 ~ 2.6.30.4

5. ÇØ°á ¹æ¾È (¡Ø ¹öÁ¯¿¡ µû¶ó Àû¿ëÀÌ ¾ÈµÉ¼öµµ ÀÖ½À´Ï´Ù.)
ÃֽŠLinux Ä¿³Î(Linux 2.6.31-rc6°ú Linux 2.4.37.5 ÀÌ»ó)·Î ¾÷µ¥ÀÌÆ® ¹× Ä¿³Î ÆÐŰÁö¸¦ ¼³Ä¡Çϰųª ´çÀå ¾÷µ¥ÀÌÆ®°¡ ¾î·Á¿ï °æ¿ì ¾Æ·¡¿Í °°ÀÌ Àӽà Á¶Ä¡¸¦ ÇÕ´Ï´Ù.

Àӽà Á¶Ä¡ ¹æ¹ý 1) sysctl -w vm.mmap_min_addr=4096
Àӽà Á¶Ä¡ ¹æ¹ý 2) /etc/modprobe.conf(or modules.conf) ¿¡ ´ÙÀ½À» ¼³Á¤ÇÏ¿© ipx, pppox µîÀÇ ±âŸ ³×Æ®¿öÅ© °ü·Ã Ä¿³Î ¸ðµâÀ» ¸ø ¿Ã¸®°Ô ÇÑ´Ù.

install bluez /bin/true
install pppox /bin/true
install bluetooth /bin/true
install pppox /bin/true
install bluetooth /bin/true
install appletalk /bin/true
install ipx /bin/true
install sctp /bin/true

6. ¹èÆ÷ÆÇº° ¾÷µ¥ÀÌÆ®
- CentOS 5.x/Fedora Core 6(RHEL 5.x¿¡ ´ëÀÀ)
rpm ´Ù¿î·Îµå ÁÖ¼Ò
x86: ftp://ftp.daum.net/centos/5.3/updates/i386/RPMS/kernel-PAE-2.6.18-128.7.1.el5.i686.rpm
x86_64: ftp://ftp.daum.net/centos/5.3/updates/x86_64/RPMS/kernel-2.6.18-128.7.1.el5.x86_64.rpm

- CentOS 4.x(RHEL 4.x¿¡ ´ëÀÀ)
rpm ´Ù¿î·Îµå ÁÖ¼Ò
x86: ftp://ftp.daum.net/centos/4.8/updates/x86_64/RPMS/kernel-2.6.9-89.0.9.EL.x86_64.rpm
x86_64: ftp://ftp.daum.net/centos/4.8/updates/i386/RPMS/kernel-2.6.9-89.0.9.EL.i686.rpm

¼Ò½º ´Ù¿î·Îµå
http://kernel.org/pub/linux/kernel/v2.6/testing/patch-2.6.31-rc7.bz2
http://kernel.org/pub/linux/kernel/v2.4/linux-2.4.37.5.tar.bz2

7. Âü°í »çÀÌÆ®
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-2692
http://www.securityfocus.com/bid/36038/info
http://blog.cr0.org/2009/08/linux-null-pointer-dereference-due-to.html
http://archives.neohapsis.com/archives/fulldisclosure/2009-08/0174.html
http://kbase.redhat.com/faq/docs/DOC-18065
http://www.ubuntu.com/usn/usn-819-1
http://archives.neohapsis.com/archives/fulldisclosure/2009-08/0174.html
https://rhn.redhat.com/errata/RHSA-2009-1222.html
https://rhn.redhat.com/errata/RHSA-2009-1223.html



8. Á÷Á¢ ¾÷µ¥ÀÌÆ®°¡ ¾î·Á¿î °æ¿ì , 1:1 »ó´ã °Ô½ÃÆÇ¿¡   ¾Æ·¡¿Í °°ÀÌ ½Åû ÇØ Áֽñ⠹ٶø´Ï´Ù.

1) ¾÷ü¸í :
2) ¾ÆÀÌÇÇ ¶Ç´Â ´ëÇ¥µµ¸ÞÀÎ :
3) root ÆÐ½º¿öµå :
4) ÆÐÄ¡ ºñ¿ëÀº ¼­¹ö´ç 33,000¿ø ÀÌ¸ç ¾Æ·¡ °èÁ·ΠÀÔ±Ý ¹Ù¶ø´Ï´Ù.
- ±¹¹ÎÀºÇà 873201-04-154782 ¸¶·çÀÎÅͳÝ(ÁÖ)


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1Â÷ ÀÏÁ¤ : 9¿ù 03ÀÏ (¸ñ¿äÀÏ) 0½Ã ~ 4½Ã

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