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Gentoo Linux Security Advisory GLSA 200407-03 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Apache 2: Remote denial of service attack |
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Date: July 04, 2004 |
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Bugs: #55441 |
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ID: 200407-03 |
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Synopsis |
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======== |
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|
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A bug in Apache may allow a remote attacker to perform a Denial of |
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Service attack. With certain configurations this could lead to a heap |
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based buffer overflow. |
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Background |
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========== |
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|
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The Apache HTTP Server Project is an effort to develop and maintain an |
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open-source HTTP server for modern operating systems. The goal of this |
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project is to provide a secure, efficient and extensible server that |
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provides services in tune with the current HTTP standards. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-www/apache <= 2.0.49-r3 >= 2.0.49-r4 |
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< 2 |
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|
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Description |
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=========== |
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|
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A bug in the protocol.c file handling header lines will cause Apache to |
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allocate memory for header lines starting with TAB or SPACE. |
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|
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Impact |
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====== |
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|
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An attacker can exploit this vulnerability to perform a Denial of |
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Service attack by causing Apache to exhaust all memory. On 64 bit |
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systems with more than 4GB of virtual memory a possible integer |
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signedness error could lead to a buffer based overflow causing Apache |
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to crash and under some circumstances execute arbitrary code as the |
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user running Apache, usually "apache". |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. All users are encouraged to |
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upgrade to the latest available version: |
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Resolution |
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========== |
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Apache 2 users should upgrade to the latest version of Apache: |
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# emerge sync |
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# emerge -pv ">=net-www/apache-2.0.49-r4" |
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# emerge ">=net-www/apache-2.0.49-r4" |
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|
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References |
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========== |
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|
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[ 1 ] Georgi Guninski security advisory #70, 2004 |
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http://www.guninski.com/httpd1.html |
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[ 2 ] CAN-2004-0493 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0493 |
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|
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Availability |
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============ |
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|
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200407-03.xml |
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Concerns? |
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========= |
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|
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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|
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License |
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======= |
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Copyright 2004 Gentoo Technologies, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/1.0 |
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