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Gentoo Linux Security Advisory GLSA 200512-09 |
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http://security.gentoo.org/ |
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Severity: Low |
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Title: cURL: Off-by-one errors in URL handling |
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Date: December 16, 2005 |
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Bugs: #114710 |
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ID: 200512-09 |
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Synopsis |
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======== |
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|
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cURL is vulnerable to local arbitrary code execution via buffer |
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overflow due to the insecure parsing of URLs. |
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Background |
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========== |
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cURL is a command line tool for transferring files with URL syntax, |
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supporting numerous protocols. |
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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-misc/curl < 7.15.1 >= 7.15.1 |
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Description |
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=========== |
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|
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Stefan Esser from the Hardened-PHP Project has reported a vulnerability |
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in cURL that allows for a local buffer overflow when cURL attempts to |
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parse specially crafted URLs. The URL can be specially crafted in one |
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of two ways: the URL could be malformed in a way that prevents a |
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terminating null byte from being added to either a hostname or path |
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buffer; or the URL could contain a "?" separator in the hostname |
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portion, which causes a "/" to be prepended to the resulting string. |
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|
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Impact |
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====== |
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|
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An attacker capable of getting cURL to parse a maliciously crafted URL |
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could cause a denial of service or execute arbitrary code with the |
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privileges of the user making the call to cURL. An attacker could also |
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escape open_basedir or safe_mode pseudo-restrictions when exploiting |
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this problem from within a PHP program when PHP is compiled with |
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libcurl. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All cURL users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/curl-7.15.1" |
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References |
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========== |
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[ 1 ] CVE-2005-4077 |
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http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4077 |
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[ 2 ] Hardened-PHP Advisory |
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http://www.hardened-php.net/advisory_242005.109.html |
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Availability |
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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-200512-09.xml |
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Concerns? |
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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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License |
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======= |
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Copyright 2005 Gentoo Foundation, 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/2.0 |
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