CVE-2007-2589

Cross-site request forgery (CSRF) vulnerability in compose.php in SquirrelMail 1.4.0 through 1.4.9a allows remote attackers to send e-mails from arbitrary users via certain data in the SRC attribute of an IMG element.

Weakness

The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

Affected Software

Potential Mitigations

• Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
• For example, use anti-CSRF packages such as the OWASP CSRFGuard. [REF-330]
• Another example is the ESAPI Session Management control, which includes a component for CSRF. [REF-45]
• Use the “double-submitted cookie” method as described by Felten and Zeller:
• When a user visits a site, the site should generate a pseudorandom value and set it as a cookie on the user’s machine. The site should require every form submission to include this value as a form value and also as a cookie value. When a POST request is sent to the site, the request should only be considered valid if the form value and the cookie value are the same.
• Because of the same-origin policy, an attacker cannot read or modify the value stored in the cookie. To successfully submit a form on behalf of the user, the attacker would have to correctly guess the pseudorandom value. If the pseudorandom value is cryptographically strong, this will be prohibitively difficult.
• This technique requires Javascript, so it may not work for browsers that have Javascript disabled. [REF-331]

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/111.html
• https://cwe.mitre.org/data/definitions/462.html
• https://cwe.mitre.org/data/definitions/467.html
• https://cwe.mitre.org/data/definitions/62.html

References

• http://docs.info.apple.com/article.html?artnum=306172
• http://lists.apple.com/archives/security-announce//2007/Jul/msg00004.html
• http://osvdb.org/35889
• http://secunia.com/advisories/25200
• http://secunia.com/advisories/25320
• http://secunia.com/advisories/25787
• http://secunia.com/advisories/26235
• http://www.mandriva.com/security/advisories?name=MDKSA-2007:106
• http://www.novell.com/linux/security/advisories/2007_13_sr.html
• http://www.securityfocus.com/bid/25159
• http://www.squirrelmail.org/security/issue/2007-05-09
• http://www.vupen.com/english/advisories/2007/1748
• http://www.vupen.com/english/advisories/2007/2732
• https://exchange.xforce.ibmcloud.com/vulnerabilities/34219
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11448
• https://rhn.redhat.com/errata/RHSA-2007-0358.html