[SA15543] PHPMailer "Data()" Denial of Service Vulnerability

---

Bist Du interessiert an einem neuen Job in IT-Sicherheit?

Secunia hat zwei freie Stellen als Junior und Senior Spezialist in IT-
Sicherheit:
http://secunia.com/secunia_vacancies/

---

TITLE:
PHPMailer "Data()" Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA15543

VERIFY ADVISORY:
http://secunia.com/advisories/15543/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
PHPMailer 1.x
http://secunia.com/product/5177/

DESCRIPTION:
Mariano Nuсez Di Croce has reported a vulnerability in PHPMailer,
which can be exploited by malicious people to cause a DoS (Denial of
Service).

The vulnerability is caused due to an error in the processing of
overly long headers in the "Data()" function in "class.smtp.php".
This can be exploited to consume a large amount of CPU and memory
resources on a vulnerable server via an application using the
vulnerable mail library.

The vulnerability has been reported in version 1.7.2. Other versions
may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly verified.

PROVIDED AND/OR DISCOVERED BY:
Mariano Nuсez Di Croce, CYBSEC S.A.

ORIGINAL ADVISORY:
http://www.cybsec.com/vuln/PHPMailer-DOS.pdf

---

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/

Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.