FreeBSD : pubcookie-login-server -- XSS vulnerability (855cd9fa-c452-11da-8bff-000ae42e9b93)

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Synopsis :

The remote FreeBSD host is missing a security-related update.

Description :

Nathan Dors of the Pubcookie Project reports :

Multiple non-persistent XSS vulnerabilities were found in the
Pubcookie login server's compiled binary 'index.cgi' CGI program. The
CGI program mishandles untrusted data when printing responses to the
browser. This makes the program vulnerable to carefully crafted
requests containing script or HTML. If an attacker can lure an
unsuspecting user to visit carefully staged content, the attacker can
use it to redirect the user to his or her local Pubcookie login page
and attempt to exploit the XSS vulnerabilities.

These vulnerabilities are classified as *critical* due to the nature
and purpose of the Pubcookie login server for user authentication and
Web Single Sign-on (SSO). Specific threats include :

- An attacker who injects malicious script through the vulnerabilities
might steal senstive user data including a user's authentication
credentials (usernames and passwords);

- An attacker who injects malicious script through the vulnerabilities
might steal private Pubcookie data including a user's authentication
assertion ('granting') cookies and SSO ('login') session cookies;

- An attacker who injects HTML tags through the vulnerabilities might
deface a site's Pubcookie login page for a single visit by a single
user (i.e. a non-persistent defacement).

At the heart of these threats lies a violation of the user's trust in
the Pubcookie login server.

See also :

http://www.nessus.org/u?d79b5eae

Solution :

Update the affected package.

Risk factor :

High

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 21462 (freebsd_pkg_855cd9fac45211da8bff000ae42e9b93.nasl)

Bugtraq ID:

CVE ID:

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