Input validation error in PHP - CVE-2007-4840
Published: October 15, 2018 / Updated: June 8, 2025
Vulnerability identifier: #VU110362
CSH Severity: Medium
CVSS v4.0:
CVE-ID: CVE-2007-4840
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: PHP Group
Affected software:
PHP
PHP
Detailed vulnerability description
The vulnerability allows context-dependent attackers to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can 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.
How to mitigate CVE-2007-4840
Install update from vendor's website.
Sources
- http://lists.opensuse.org/opensuse-security-announce/2008-01/msg00006.html
- http://osvdb.org/38916
- http://secunia.com/advisories/27102
- http://secunia.com/advisories/27659
- http://secunia.com/advisories/28658
- http://secunia.com/advisories/30040
- http://securityreason.com/securityalert/3122
- http://wiki.rpath.com/wiki/Advisories:rPSA-2007-0242
- http://www.gentoo.org/security/en/glsa/glsa-200710-02.xml
- http://www.securityfocus.com/archive/1/478730/100/0/threaded
- http://www.securityfocus.com/archive/1/491693/100/0/threaded
- https://issues.rpath.com/browse/RPL-1943