WebApp Sec mailing list archives
Re: Session security with cookies
From: Vicente Aguilera <vaguilera () isecauditors com>
Date: Wed, 05 Dec 2007 09:24:53 +0100
Hi, Jeffory Atkinson wrote:
Till, Here are some factors that you will want to ensure. -Session token is delivered after authentication -Each session token is unique and not predictable (requiring a strong random token generator) -Session token is transfer over an encrypted tunnel -Session token is marked secure -Ensure the session is terminated at logout -Ensure the session times out in a reasonable amount of time -All access control should be based on the user's session token and only the session token
The information to authenticate a user should not rely solely on the session cookie. In this case it would be vulnerable to CSRF (Cross Site Request Forgery) attacks. It's necessary to use another token (URL parameter, hidden form fields, etc.) cryptographically secure to prevent these attacks. Regards, -- _________________________________ Vicente Aguilera Díaz Director Auditoría CISA, CISSP, ITIL, CEH Instructor, OPSA, OPST OWASP Spain Chapter Leader vaguilera () isecauditors com PGP: 0x3E74464D - 8D3C B308 4F40 896E 50A8 B66B 80DF 107D 3E74 464D Internet Security Auditors, S.L. c. Santander, 101. Edif. A. 2º 1ª. 08030 Barcelona Tel: +34.933.051.318 Fax: +34.932.782.248 www.isecauditors.com ____________________________________ Este mensaje y los documentos que, en su caso lleve anexos, pueden contener información CONFIDENCIAL. Por ello, se informa al destinatario que la información contenida en el mismo es reservada y su uso no autorizado, publicación o difusión, entera o parcialmente, tanto en formato o medio físico como electrónico, sin el previo consentimiento de Internet Security Auditors, está prohibida legalmente. Si ha recibido este correo por error, le rogamos que nos lo comunique por la misma vía o por teléfono (93 305 13 18), se abstenga de realizar copias del mensaje o remitirlo o entregarlo a otra persona y proceda a borrarlo de inmediato. En cumplimiento de la Ley Orgánica 15/1999 de 13 de diciembre de protección de datos de carácter personal, Internet Security Auditors S.L., le informa de que sus datos personales se han incluido en ficheros informatizados titularidad de Internet Security Auditors S.L., que será el único destinatario de dichos datos, y cuya finalidad exclusiva es la gestión de clientes y acciones de comunicación comercial, y de que tiene la posibilidad de ejercer los derechos de acceso, rectificación, cancelación y oposición previstos en la ley mediante carta dirigida a Internet Security Auditors, c. Santander, 101. Edif. A. 2º 1ª, 08030 Barcelona, o vía e-mail a la siguiente dirección de correo: legal () isecauditors com
-----Original Message----- From: listbounce () securityfocus com [mailto:listbounce () securityfocus com] On Behalf Of Till Elsner Sent: Monday, December 03, 2007 6:32 PM To: webappsec () securityfocus com Subject: Session security with cookies Hi, i'm investigating in web application security this time and i'm trying to find some information about session management with cookies and related security issues. Can anyone point me to tips on how to make cookie based sessions more secure and how to prevent session hijacking? How secure is session handling using cookies and what are the main risks? Is anyone aware of good literature on that topic? Thanks and have a nice day Till ------------------------------------------------------------------------ - Sponsored by: Watchfire Methodologies & Tools for Web Application Security Assessment With the rapid rise in the number and types of security threats, web application security assessments should be considered a crucial phase in the development of any web application. What methodology should be followed? What tools can accelerate the assessment process? Download this Whitepaper today! https://www.watchfire.com/securearea/whitepapers.aspx?id=70170000000940F ------------------------------------------------------------------------ - ------------------------------------------------------------------------- Sponsored by: Watchfire Methodologies & Tools for Web Application Security Assessment With the rapid rise in the number and types of security threats, web application security assessments should be considered a crucial phase in the development of any web application. What methodology should be followed? What tools can accelerate the assessment process? Download this Whitepaper today! https://www.watchfire.com/securearea/whitepapers.aspx?id=70170000000940F -------------------------------------------------------------------------
------------------------------------------------------------------------- Sponsored by: Watchfire Methodologies & Tools for Web Application Security Assessment With the rapid rise in the number and types of security threats, web application security assessments should be considered a crucial phase in the development of any web application. What methodology should be followed? What tools can accelerate the assessment process? Download this Whitepaper today! https://www.watchfire.com/securearea/whitepapers.aspx?id=70170000000940F -------------------------------------------------------------------------
Current thread:
- Session security with cookies Till Elsner (Dec 04)
- Re: Session security with cookies Paul Johnston (Dec 04)
- RE: Session security with cookies Jeffory Atkinson (Dec 04)
- Re: Session security with cookies bugtraq (Dec 04)
- Re: Session security with cookies Thomas (Dec 05)
- Re: Session security with cookies Aaron Katz (Dec 05)
- Re: Session security with cookies Aaron Katz (Dec 05)
- Re: Session security with cookies Vicente Aguilera (Dec 05)
- RE: Session security with cookies WebAppSec (Dec 08)
- Re: Session security with cookies Ron (Dec 04)
- Re: Session security with cookies Aaron Katz (Dec 04)
- Re: Session security with cookies Till Elsner (Dec 05)
- Re: Session security with cookies Aaron Katz (Dec 05)
- Re: Session security with cookies Till Elsner (Dec 05)
- Re: Session security with cookies Aaron Katz (Dec 05)
- Re: Session security with cookies Aaron Shelmire (Dec 08)
- Re: Session security with cookies Eduardo Tongson (Dec 08)
- Cryptographically Generated Cookies Paul Johnston (Dec 12)
- Re: Session security with cookies Aaron Katz (Dec 04)