var-201307-0483
Vulnerability from variot
The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a chunked Transfer-Encoding request with a large chunk size, which triggers an integer signedness error and a stack-based buffer overflow. nginx is prone to a stack-based buffer-overflow vulnerability. Successfully exploiting this issue allows attackers to execute arbitrary code in the context of the vulnerable application. Failed exploit attempts will result in a denial-of-service condition. The issue is fixed in nginx 1.4.1 and 1.5.0. nginx is a lightweight web server/reverse proxy server and email (IMAP/POP3) proxy server developed by Russian programmer Igor Sysoev. A denial of service vulnerability exists in the 'ngx_http_parse_chunked' function in http/ngx_http_parse.c in nginx versions 1.3.9 to 1.4.0. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201310-04
http://security.gentoo.org/
Severity: Normal Title: nginx: Multiple vulnerabilities Date: October 06, 2013 Bugs: #458726, #468870 ID: 201310-04
Synopsis
Multiple vulnerabilities have been found in nginx, the worst of which may allow execution of arbitrary code.
Background
nginx is a robust, small, and high performance HTTP and reverse proxy server.
Affected packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-servers/nginx < 1.4.1-r2 >= 1.4.1-r2
Description
Multiple vulnerabilities have been discovered in nginx. Please review the CVE identifiers referenced below for details.
Impact
A remote attacker could send a specially crafted request, possibly resulting in execution of arbitrary code with the privileges of the process, or a Denial of Service condition. Furthermore, a context-dependent attacker may be able to obtain sensitive information.
Workaround
There is no known workaround at this time.
Resolution
All nginx users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=www-servers/nginx-1.4.1-r2"
References
[ 1 ] CVE-2013-0337 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-0337 [ 2 ] CVE-2013-2028 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2028 [ 3 ] CVE-2013-2070 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2070
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-201310-04.xml
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License
Copyright 2013 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5 . From: Maxim Dounin mdounin at mdounin.ru Tue May 7 11:30:26 UTC 2013
Hello!
Greg MacManus, of iSIGHT Partners Labs, found a security problem in several recent versions of nginx.
Patch for the problem can be found here:
http://nginx.org/download/patch.2013.chunked.txt
As a temporary workaround the following configuration can be used in each server{} block:
if ($http_transfer_encoding ~* chunked) {
return 444;
}
-- Maxim Dounin http://nginx.org/en/donation.html
Show details on source website{
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"data": "The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a chunked Transfer-Encoding request with a large chunk size, which triggers an integer signedness error and a stack-based buffer overflow. nginx is prone to a stack-based buffer-overflow vulnerability. \nSuccessfully exploiting this issue allows attackers to execute arbitrary code in the context of the vulnerable application. Failed exploit attempts will result in a denial-of-service condition. \nThe issue is fixed in nginx 1.4.1 and 1.5.0. nginx is a lightweight web server/reverse proxy server and email (IMAP/POP3) proxy server developed by Russian programmer Igor Sysoev. A denial of service vulnerability exists in the \u0027ngx_http_parse_chunked\u0027 function in http/ngx_http_parse.c in nginx versions 1.3.9 to 1.4.0. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\nGentoo Linux Security Advisory GLSA 201310-04\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n http://security.gentoo.org/\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n\n Severity: Normal\n Title: nginx: Multiple vulnerabilities\n Date: October 06, 2013\n Bugs: #458726, #468870\n ID: 201310-04\n\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n\nSynopsis\n========\n\nMultiple vulnerabilities have been found in nginx, the worst of which\nmay allow execution of arbitrary code. \n\nBackground\n==========\n\nnginx is a robust, small, and high performance HTTP and reverse proxy\nserver. \n\nAffected packages\n=================\n\n -------------------------------------------------------------------\n Package / Vulnerable / Unaffected\n -------------------------------------------------------------------\n 1 www-servers/nginx \u003c 1.4.1-r2 \u003e= 1.4.1-r2\n\nDescription\n===========\n\nMultiple vulnerabilities have been discovered in nginx. Please review\nthe CVE identifiers referenced below for details. \n\nImpact\n======\n\nA remote attacker could send a specially crafted request, possibly\nresulting in execution of arbitrary code with the privileges of the\nprocess, or a Denial of Service condition. Furthermore, a\ncontext-dependent attacker may be able to obtain sensitive information. \n\nWorkaround\n==========\n\nThere is no known workaround at this time. \n\nResolution\n==========\n\nAll nginx users should upgrade to the latest version:\n\n # emerge --sync\n # emerge --ask --oneshot --verbose \"\u003e=www-servers/nginx-1.4.1-r2\"\n\nReferences\n==========\n\n[ 1 ] CVE-2013-0337\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-0337\n[ 2 ] CVE-2013-2028\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2028\n[ 3 ] CVE-2013-2070\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2070\n\nAvailability\n============\n\nThis GLSA and any updates to it are available for viewing at\nthe Gentoo Security Website:\n\n http://security.gentoo.org/glsa/glsa-201310-04.xml\n\nConcerns?\n=========\n\nSecurity is a primary focus of Gentoo Linux and ensuring the\nconfidentiality and security of our users\u0027 machines is of utmost\nimportance to us. Any security concerns should be addressed to\nsecurity@gentoo.org or alternatively, you may file a bug at\nhttps://bugs.gentoo.org. \n\nLicense\n=======\n\nCopyright 2013 Gentoo Foundation, Inc; referenced text\nbelongs to its owner(s). \n\nThe contents of this document are licensed under the\nCreative Commons - Attribution / Share Alike license. \n\nhttp://creativecommons.org/licenses/by-sa/2.5\n. From: Maxim Dounin mdounin at mdounin.ru\nTue May 7 11:30:26 UTC 2013\n\nHello!\n\nGreg MacManus, of iSIGHT Partners Labs, found a security problem\nin several recent versions of nginx. \n\nPatch for the problem can be found here:\n\nhttp://nginx.org/download/patch.2013.chunked.txt\n\nAs a temporary workaround the following configuration\ncan be used in each server{} block:\n\n if ($http_transfer_encoding ~* chunked) {\n return 444;\n }\n\n\n-- \nMaxim Dounin\nhttp://nginx.org/en/donation.html\n\n\n",
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
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