Cookie Not Marked as HttpOnly
Severity: Low
Summary #
Netsparker identified a cookie not marked as HTTPOnly.
HTTPOnly cookies cannot be read by client-side scripts, therefore marking a cookie as HTTPOnly can provide an additional layer of protection against cross-site scripting attacks.
Impact #
During a cross-site scripting attack, an attacker might easily access cookies and hijack the victim's session.
Actions To Take #
- See the remedy for solution.
- Consider marking all of the cookies used by the application as HTTPOnly. (After these changes javascript code will not be able to read cookies.)
Remediation #
Mark the cookie as HTTPOnly. This will be an extra layer of defense against XSS. However this is not a silver bullet and will not protect the system against cross-site scripting attacks. An attacker can use a tool such as XSS Tunnel to bypass HTTPOnly protection.
Classifications #
CAPEC-107, CWE-16, ISO27001-A.14.2.5, WASC-15, OWASP 2013-A5, OWASP 2017-A6
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