National Cyber-Alert System
Vulnerability Summary for CVE-2007-4840
Original release date:09/12/2007
Last revised:02/05/2009
Source:
US-CERT/NIST
Overview
PHP 5.2.4 and earlier allows context-dependent attackers to cause a denial of service (application crash) via (1) a long string in the out_charset parameter to the iconv function; or a long string in the charset parameter to the (2) iconv_mime_decode_headers, (3) iconv_mime_decode, or (4) iconv_strlen function. NOTE: this might not be a vulnerability in most web server environments that support multiple threads, unless these issues can be demonstrated for code execution.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
2.9
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown
- Official Statement from Red Hat (09/13/2007)
-
We do not consider this to be a security issue. For more information please see
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169857#c1
and http://www.php.net/security-note.php
References to Advisories, Solutions, and Tools
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External Source: BUGTRAQ
Name: 20070906 PHP <= 5.2.4 multiple Iconv functions denial of service
External Source: CONFIRM
Name: http://wiki.rpath.com/wiki/Advisories:rPSA-2007-0242
External Source: OSVDB
Name: 38916
External Source: CONFIRM
Name: https://issues.rpath.com/browse/RPL-1943
External Source: HP
Name: HPSBUX02332
External Source: GENTOO
Name: GLSA-200710-02
External Source: SREASON
Name: 3122
External Source: SECUNIA
Name: 30040
External Source: SECUNIA
Name: 28658
External Source: SECUNIA
Name: 27659
External Source: SECUNIA
Name: 27102
External Source: SUSE
Name: SUSE-SA:2008:004